Arcane mage guide by Takai of Trollbane (EU), posted on the Official Blizzard Forums.
I’m sure that experienced Mages know all this stuff, and have their own way of doing things, but I’m also sure that there are people with alts, or new Mages that want to improve their dps, and this guide should help. [...]

Quote from: Bashiok

Cataclysm Class Preview: Druid
In World of Warcraft: Cataclysm we’ll be making several changes to class talents and abilities. Here you will get a glimpse into some of the changes we have in store for the druid. The information you’re about to read is certainly not complete, and is only meant to act as [...]

Another good guide from wow-europe forums! Written by a noam Mage Dribbler of  Ravencrest, EU.

Update: Warlock, Mage and Rogue sets added!
Blizzard have officially released some high res screenshots of Tier-10 armor sets, so far the classes previewed are: Death Knight, Druid, Hunter and Warrior with the other classes to be added soon. You can check them out here: http://www.wow-europe.com/en/info/underdev/3p3/tier10sneak.html

Quote from: Bornakk
We have made some updates to the sets in the number values so keep an eye out for them and continue to give us your feedback.
Update:
Mage 2 piece bonus – Hot Streak, Missile Barrage and Brain Freeze grant 12% haste for 5 sec.
Mage 4 piece bonus – Mirror Image is 30 [...]