im a little late on this, but mages didn't change much at all.
Itemization has changed a little, we, as mages, no longer hate spirit. we enjoy it less than most of our other stats.
talents dps rankings. If you want the actual numbers, EJ has it all
1- Fireball/torment of the weak ~400 dps lead
http://www.wowhead.com/?talent#of0Vcd0c ... hct:VLio0z
2- Frostfire bolt~ 400 dps ahead of arcane
http://www.wowhead.com/?talent#oZfVcbRh ... coc:ILio0z
3- Arcane~still ahead of frost.
http://www.wowhead.com/?talent#ofoVcu0I ... c0o:NzMo0z
(there are some things you can do to shake that up...)
http://www.wowhead.com/?talent#of0fck0c ... fRx:RqGo0z
(but its sooo ugly, and meh... this is max single target, and you'd need an ICBM to catch up cuz its soo far away behind)
that is for single target dps. i'll post talent builds later, but they are essentially unchanged.
gear. for fire or frostfire bolt (they both gear identically, fireball favors sp and haste more than ffb)
the best in slot gear for non hard modes is as follows
[Collar of the Wyrmhunter]
[Wyrmrest Necklace of Power]
[Conqueror's Kirin Tor Shoulderpads]
[Conqueror's Kirin Tor Tunic]
[Bracers of Unleashed Magic]
[Conqueror's Kirin Tor Gauntlets]
[Sash of Ancient Power]
[Conqueror's Kirin Tor Leggings]
[Sandals of Rash Temperament]
[Signet of Manifested Pain], [Pyrelight Circle]
[Scale of Fates], [Eye of the Broodmother]
[Runescribed Blade], [Ironmender]
[Scepter of Lost Souls]
i'll post the hard mode 25 mans a little later (read when we start working on them)
so... take raiding seriously, pay attention to what your doing, and be prepared for something that is a challenge.