While I doubt this is a perfect list, it sure has a lot of information, much of it worth knowing:

http://www.wowwiki.com/Patch_3.0.2_%28undocumented_changes%29

Alchemists in particular need to get to a trainer and learn Mixology! Tailors have to be happy to see that it only takes 5 pieces of netherweave to make a bolt now instead of 6. Boy, THAT would have added up while leveling tailoring to 375!