I've always been a huge fan of Crafted items, and since we didn't see any on the homepage (so far) I wanted to take some time to speculate what we might see in Cataclysm.
Armor:
I'd love to see another craftable gear set, like the ones available at Level 77 now. For mains, this wouldn't be a huge impact, as Tier 10/ICC Gear will probably last until 85, but when leveling a new toon, these sets proved very helpful not only for those last 3 levels, but also as a great launching point for Heroics and the lesser raids.
Weapons: Like the armor, most craftable weapons (other than the "best" tier [i.e. Titansteel Destroyer]) wouldn't be a huge impact on a main character that has gear from ICC25, but once again, for a new toon to 85, and maybe the last 2 levels, it could be a big difference, and a great starting point for gearing up.
Mounts: The Mekgineer's Chopper was a great addition to Wrath of the Lich King, however, the price tag that came with it was rather disappointing. I'd like to see a few more craftable mounts with a less hefty investment.
Alchemy: There is so much more that could be done with this profession. I'd love to see the ability to poison weapons (stacking with Enchants) just to do more Damage. I know this is the Rogue "thing" (Trust me, I know, I play one), but make it certainly less potent. Perhaps an item that would let Alchemists do the Poison Vial move from ToChampion.
Also, bring back Cauldrons! Those were fun to use!
Engineering: I love the flavor items that Engineer's get to have. Rocket boots? Parachutes? Helicopters? Oh my! A few more things we could add to the Engineering 'Arsenal': Mines. We have them already in the form of hunter traps, but wouldn't it be interesting if there were stun mines and explosive mines to watch out for in BGs? Personal Shield Generator: For the tank, that also wants to be an engineer. Or vice versa. Make it something that "Enchants" your Shield, or maybe just your weapon, to allow you to have a small On-Use damage shield. A submarine would be cool in the future as well!
Flavor Items: Like the banners from the Argent Tournament, but with your guild logo? Yes please! Guild Mascot Non-Combat pet? Yes please! Silly things like this are something I love about WoW. I'm a huge fan of the Super Simian Sphere or the Orb of Deception, etc. I think it'd be awesome if Tailors could craft "costumes" that have a limited use or something of the sort. Likewise, Leatherworkers creating banners that we could personalize, or have the Guild logo on it would be fun.
I have a closet-full of ideas, but this works for now!
Think my ideas are terrible? Tell me why!
Have some other awesome ideas for Professions in the future? I want to hear them!