http://wotlk.wikidot.com/
So, the client goes out for download and a few hours later it's up on torrent sites, being mined for new MPQ data like models and talents.
If you (or someone you know) are in the Alpha, for god's sake (and theirs) just keep it to yourself. People can and will get fired over stuff like this.
That said, here's the most recent compendium of stuff: Talents, new models, some crazy shit if it's all true.