CrimsonNeko provided a link to the BC Beta professions forum in the "Jewelcrafting Info" thread, but I wanted to make a seperate post with this link as well. (One with a more clear title.)
Anyway, check it out:
http://beta.worldofwarcraft.com./board.html?forumId=10017
There's a lot of great info on what people are discovering profession-wise in the beta testing. And you can use this to jump to all the other beta forums, too.