I'm sure these will be on the front page within a few hours, but for those who are as impatient as me:
Warlock
Affliction
* Shadow Embrace: Now stacks 3 times. Healing reduction effect reduced to 2/4/8/10% (down from 3/6/9/12/15%).
Demonology
* Demonic Pact: This talent now increases your spell damage by 2/4/6/8/10% (up from 1/2/3/4/5%). The benefit to party/raid members remains unchanged.
Destruction
* Conflagrate: Periodic Spell damage increased to 40% (Up from 20%)
* Empowered Imp: Damage done by imp increased to 10/20/30% (Up from 5/10/15%)
* Improved Shadow Bolt: Now increases Shadow Bolt damage 2/4/6/8/10% (Up from 1/2/3/4/5%)
Obviously due at next maintenance, wherever you are.
Edit: Yeah ok, so subsequent maintenance (3rd Feb EU). To be fair, it was widely rumoured to be this week and there wasn't much info going around to the contrary. Also, I'm very, very tired.