Pets have trees too ya know.

Here are the talent trees for hunter pets, yes they have their own trees. Each type of pet has their own strengths, Cunning for PvP, Ferocity for dps, and Tenacity pets serve as a good tank for soloing.

Cunning: http://www.wowhead.com/?petcalc=Mrbo00fhoMk

Ferocity: http://www.wowhead.com/?petcalc=0md00scz0hoo

Tenacity: http://www.wowhead.com/?petcalc=0R0G0rG00k

For Josh...

...and the rest of you that need the trees for the current patch as Blizzard isn't gonna release 3.1.0 anytime soon. For rotations, check the below posts, they're still the same.

Warrior:
Fury-http://www.wowhead.com/?talent=LhrhzfhZGx00E0ubeRVzAo
Arms-http://www.wowhead.com/?talent=LhrhzfIt0crRccRtGx0sbb
Protection-http://www.wowhead.com/?talent=LVMhzZhxZVhtMxczidIzsGo

Warlocks:
Destruction-http://www.wowhead.com/?talent=IZcLc0sZVcGqM0uVsAfst
Demonology-http://www.wowhead.com/?talent=IZ0gIzsgoV0sguAoVMhq
Affliction-http://www.wowhead.com/?talent=IcxoburAkVVRbstZVchq

Shaman:
Elemental-http://www.wowhead.com/?talent=hEh0qzdItGxst0xxI
Enhancement-http://www.wowhead.com/?talent=hi0hsZ0xxIoxdAIkufot
Restoration-http://www.wowhead.com/?talent=hZ0xxIZxcekVxoxkrIRt

Rogue:
Combat-http://www.wowhead.com/?talent=f0eb0xZMgVbx0xoru0gRtx
Assassination-http://www.wowhead.com/?talent=f0efoeLoVboIzAo0xV0hZxb

Priest:
Discipline-http://www.wowhead.com/?talent=bqcbhhxtrxsicRtfVz
Holy-http://www.wowhead.com/?talent=bVcbzhZcxtccMqiuVcst
Shadow-http://www.wowhead.com/?talent=bVcb0hZZGcfioskfiqczAo

Paladin:
Holy-http://www.wowhead.com/?talent=sxAzxGzhVuMxRtZVcbx0h
Protection-http://www.wowhead.com/?talent=sVZaxVA0ugteIRhox
Retribution-http://www.wowhead.com/?talent=sZaxZVfbtbIucrsguAo

Mage:
Fire-http://www.wowhead.com/?talent=oZcE00RhIuVubhstMIccoc
Frost-http://www.wowhead.com/?talent=of0V0zZZVIccsfu0fdgfst
Arcane-http://www.wowhead.com/?talent=of0Vcu0IzxGuMtedcZmhc0o

Hunter:
Beast Master-http://www.wowhead.com/?talent=cgbMzxxRiuzxstceVbo
Marksmanship-http://www.wowhead.com/?talent=cZceV0ouzGesxkAoe00io
Survival-http://www.wowhead.com/?talent=cxZ0eVZe00i0cIhxuA0ct

Druid:
Balance-http://www.wowhead.com/?talent=0xGbuiIoIdhVhouZbxcub
Feral(Bear Tank)-http://www.wowhead.com/?talent=0ZxGGscrzceRczzAo0Eczb
Feral(Cat dps)-http://www.wowhead.com/?talent=0ZxGMsfrzbeR0huAo0Eczb
Restoration-http://www.wowhead.com/?talent=0VG0uZZfVcubuxiuA0st

Death Knight:
Frost(Tank)-http://www.wowhead.com/?talent=j0EMoZhxxtoe0ohRVssx0x
Frost(dps)-http://www.wowhead.com/?talent=jfVMVZG0xxIxzoGRAosx
Blood-http://www.wowhead.com/?talent=jfVMVh0IsfotzAoZfM0hxco
Unholy-http://www.wowhead.com/?talent=jfVMVZZf0hhxckxcqMcsut

Mages

I'll get right to the point with this one:

Arcane-Use Arcane Blast x3, then arcane Barrage, rinse and repeat.

http://talent.mmo-champion.com/?mage=23000503310033015032310251532103000000000000000000000000000430030010000000000000000000&glyph=011804010608&version=9637

Fire-Fireball, Living Bomb, Pyroblast, and Scorch to apply 5 stacks of Improved Scorch to the target, making sure to cast it every 30 seconds to keep it up.

http://talent.mmo-champion.com/?mage=00000000000000000000000000000003550000123033310531203013510530030013030000000000000000&glyph=161808020608&version=9637

Frost-Nothing but Frostbolts, and Fireball when you get the Brain Freeze effect. Cast Water Elemental and Icy Veins when their up.

http://talent.mmo-champion.com/?mage=23000500310000000000000000000000000000000000000000000000000533030313133100230152231351&glyph=101808010608&version=9637

Enjoy.

Priests

Here's the talent guide for the Priest class.

Discipline is the priests optimal PvP spec, you gain survivability, and keeping others alive as well.
Casting Penance, Renew, and Flash Heals as needed.

http://talent.mmo-champion.com/?priest=150320313050251233132303125123050100000000000000000000000000000000000000000000000&glyph=051215030602&version=9637

Who said Priests only heal? Shadow Priests can be a great raid aspect with replenishment effects. A good rotation is Vampiric Embrace, Vampiric Touch, Shadow Word: Pain, Devouring Plague, Mind Blast, and Mind Flay. When the target is below 35% health, feel free to cast Shadow Word: Death, but be careful to watch your health.

http://talent.mmo-champion.com/?priest=050320300000000000000000000000000000000000000000000000325323051013012323150301351&glyph=171819030602&version=9637

For Holy, refer to the healer post.
Enjoy.

New trees, and Mutilate.

As you can see, I've updated all my links to the current talent trees that will be available with the new patch that is to come out, which introduces Dual-Specs and Ulduar.

And here is another spec to consider for you rogues, Mutilate.

Mutilate follows the basic principles like keeping rupture and slice and dice up, but now you also must keep Hunger for Blood active as well. Instead of Sinister Strike, use Mutilate, which means you'll want 2 daggers. Deadly Poison on the main-hand, Instant Poison on the off-hand. Quicker daggers yield better results due to poison procs and focused attacks.

http://talent.mmo-champion.com/?rogue=00532310534010052010330135100500500300000000000000000005020000000000000000000000000&glyph=181620060501&version=9626

Enjoy.