Blizzard recently unveiled the highly-anticipated talent calculator for their upcoming expansion, Lua error in package.lua at line 80: module 'Module:Inlinegfx/img_link_data.json' not found. Mists of Pandaria. Below you will find direct links to each of the classes. On the site you will find both talents and abilities for all classes (
Monk coming soon). This includes the new Guardian/Feral split for 
Druids.
Keep in mind the caveat offered on the site, however:
All specs, spells and talents are not final and may change during the development process.