WoW Profession changes from the latest Beta build:

Leatherworking

• Fur Lining - Stamina - “Permanently enchant bracers to increase stamina by 90. Can only be used on the leatherworker’s bracers, and doing so will cause them to become soulbound.”
• Fur Lining - Spell Damage - “Permanently enchant bracers to increase spell power by 70. Can only be used on the leatherworker’s bracers, and doing so will cause them to become soulbound.”
• Fur Lining - Fire Resist - “Permanently enchant bracers to increase your fire resistance by 60. Can only be used on the leatherworker’s bracers, and doing so will cause them to become soulbound.”
• Fur Lining - Attack Power - “Permanently enchant bracers to increase attack power by 120. Can only be used on the leatherworker’s bracers, and doing so will cause them to become soulbound.”

Cooking

• New Cooking recipes.

Alchemy

• Transmute: Earthsiege Diamond - Transmute the element of fire and gems into a Earthsiege Diamond.
• Transmute: Skyflare Diamond - Transmute the element of air and gems into a Skyflare Diamond.

This is not realy a fully profession related post, however there is a part about Inscription ! ;)

Quote from Blizzard:

With the release of Wrath of the Lich King approaching, we wanted to provide you with some important information. In preparation for the expansion, we will be issuing a new content patch in the coming weeks. Much like the patch made available shortly before The Burning Crusade's release, this content patch is designed to bridge current game content with that of the expansion and will contain some exciting changes and additions.

We have outlined some of the larger features scheduled to release with the patch below:

New class spells and talents
Stormwind Harbor
Barbershops in capital cities
Zeppelin towers outside of Orgrimmar and Tirisfal Glades
Two brand-new Arenas featuring challenging new layouts, terrain hazards, and moving obstacles
Guild calendar
Hunter pet skill revamp
New profession: Inscription

As mentioned above, this is not a comprehensive list, just some of the major highlights. We’ll post the full patch notes as soon as they’re available. Regarding Inscription, please note that all Burning Crusade players will be able to select Inscription as one of their two professions and level up to a skill level of 375 with it. Upon the release of Wrath of the Lich King, players who purchase and install the expansion will be able to continue leveling in Inscription and the other professions beyond 375.

Below you can find the latest Profession changes in the beta.

Blacksmithing

• [Socket Bracer] - Permanently add a socket to your bracers. Requires a level 60 or higher item.
• [Socket Gloves] - Permanently add a socket to your gloves. Requires a level 60 or higher item.
• There is a new item called Titanium Belt Buckle. You will be able to socket your belt with this.

Cooking

• [Delicious Roasted Boar] - Creates a delicious roast boar platter for you and your friends to enjoy.

Engineering

• Scrapbot - Creates a mechanical vendor that buys anything. The scrapbot leaves after 5 min.
• Nitro Boosts - Permanently attaches overpowered nitro boosts to a pair of boots, allowing a skilled engineer to greatly increase run speed for until cancelled. The nitro boosts can only be activated every 5 minutes.
• Gnomish Lightning Generator - Generates a bolt of lightning to strike an enemy for 2250 to 2750 Nature damage. This entire device is made of metal, and the bolt occasionally hits you.
• Belt-Clipped Spynoculars - Permanently attaches a pair of spynoculars to your belt, allowing you to see far away. Only a skilled engineer can use the spynoculars.
• Flexweave Underlay - Permanently attaches a flexweave underlay to a cloak, allowing a skilled engineer to turn the cloak into a parachute to fall slowly for 10 sec. The cloak can only be used every 5 minutes.
• Heartseeker Scope - Attaches a permanent scope to a bow or gun that increases its ranged critical strike rating by 40.
• Micro Stabilizer - Attaches a permanent micro stabilizer to a bow or gun that increases your ranged hit rating by 40.
• Hyperspeed Accelerators - Permanently attaches hyperspeed accelerators to a pair of gloves, allowing a skilled engineer to increase their haste rating by 340 for 8 sec. The gloves can only be activated every few minutes.
• Personal Electromagnetic Pulse Generator - Permanently attaches a high-powered device to your belt, allowing you to stun nearby mechanicals. Only a skilled engineer can activate the modified belt.
• Saronite Grenade (45 yd range, instant) - Inflicts 540 to 900 Fire damage and incapacitates targets for 3 sec in a 3 yard radius. Any damage will break the effect. Unreliable against targets higher than level 90.
• Saronite Bomb (45 yd range, instant) - Inflicts 1125 to 1875 Fire damage and medium siege damage in a 10 yard radius.

Tailoring

• Lightweave Embroidery - Embroiders a subtle pattern of light into your cloak, giving you a chance to cause an additional 800 to 1000 Holy damage when you damage an enemy with a spell.
  You can only embroider your own cloak and embroidering your cloak will cause it to become soulbound.
• Darkglow Embroidery - Embroiders a magical pattern into your cloak, giving you a chance to restore 300 mana when you cast a spell.
  You can only embroider your own cloak and embroidering your cloak will cause it to become soulbound.
• Swordguard Embroidery - Embroiders a magical pattern into your cloak, causing your damaging melee attacks to sometimes ignore 1000 of your target's armor.
  You can only embroider your own cloak and embroidering your cloak will cause it to become soulbound.
• Brilliant Spellthread - Permanently embroiders spellthread into pants, increasing spell power by 50 and Spirit by 20.
• Azure Spellthread - Permanently embroiders spellthread into pants, increasing spell power by 35 and Stamina by 20.
• Shining Spellthread - Permanently embroiders spellthread into pants, increasing spell power by 35 and Spirit by 12.

Herbalism

• [Wild Growth]
  Embrace the natural energies surrounding you, healing you for 2000 over 15 sec. (300/480/720/900/1200/2000 Depending on Rank). Instant, 5 min cooldown

  Note: When you use this skill you might gain herbalism points and it make flowers grow and bloom all around you. (Screenshot)

Source: mmo-champion.com and worldofraids.com

I updated the Skinning Guide on the site with detailed maps, the maps tell you where to level your Skinning Profession for both Horde and Alliance. It took me a lot of time to put this guide together, I hope you will enjoy it!

Since I don't have any Alliance character, I unlearned my Skinning with my rogue and leveled it up again but at the Alliance zones, belive me it was a pain to go back to Horde cities to visit my trainer over and over again.

This guide does not cover the places where you can farm the most leathers, but I will finish that guide soon also along with the Disenchanting guide. I have a lot more other things in progress.

Alchemy profession changes in WotLK

• [Potion Sickness] - Unable to consume potions until you rest out of combat for a short duration.

  So you will be able to drink one potion per Boss fight. This change will allow Blizzard to design the fights that way you won't have to drink 3-5 potions per fight. It helps raiders so they won't spend that much money on Potions anymore. However this change hurts Alchemists, currently I make a lot of gold by selling potions.

• [Alchemical Blood] - You receive an increased effect when you drink an elixir, potion, or flask that you can make.

  Alchemical blood is a new passive bonus gained by alchemists learned from a profession trainer at skill level 50, it increases the stat bonus of consuming an elixir between 20-25% varying slightly by bonus. This change don't affect Flasks or Potions yet.

  Examples:

  Elixir of Major Agility: +40 agility +25 crit rating (instead of 35 agility and 20 crit rating)
  Elixir of Major Fortitude: +300 health (instead of 250 health)

  Update: Alchemical blood renamed to Mixology