Level by level talent spec guide

[Wyleai]

(Obviously I will be forced to rewrite this as soon as Wrath or 3.0 hits).

Level 10: http://www.wowhead.com/?talent=sZz
Level 11: http://www.wowhead.com/?talent=sZM
Level 12: http://www.wowhead.com/?talent=sZc
Level 13: http://www.wowhead.com/?talent=sZm
Level 14: http://www.wowhead.com/?talent=sZV
Level 15: http://www.wowhead.com/?talent=sZV0o
Level 16: http://www.wowhead.com/?talent=sZV0b
Level 17: http://www.wowhead.com/?talent=sZV0h
Level 18: http://www.wowhead.com/?talent=sZV0L
Level 19: http://www.wowhead.com/?talent=sZV0x

Improved Righteous Fury is -SO- important that maybe you should get it before getting Kings. Either way, you MUST have it to be able to hold aggro. Some tankadins never even bother to get Kings.
Level 20: http://www.wowhead.com/?talent=sZV0t
Level 21: http://www.wowhead.com/?talent=sZV0to
Level 22: http://www.wowhead.com/?talent=sZV0tb
Level 23: http://www.wowhead.com/?talent=sZV0th

Level 24: http://www.wowhead.com/?talent=sZV0tu
Level 25: http://www.wowhead.com/?talent=sZV0tG
Level 26: http://www.wowhead.com/?talent=sZV0tI
Level 27: http://www.wowhead.com/?talent=sZV0tIo
Level 28: http://www.wowhead.com/?talent=sZV0tIb
Level 29: http://www.wowhead.com/?talent=sZV0tIh
Level 30: http://www.wowhead.com/?talent=sZV0tIh0z
Level 31: http://www.wowhead.com/?talent=sZV0tIL0z
Level 32: http://www.wowhead.com/?talent=sZV0tIx0z
Level 33: http://www.wowhead.com/?talent=sZVotIx0z
Level 34: http://www.wowhead.com/?talent=sZVbtIx0z
Level 35: http://www.wowhead.com/?talent=sZVbtIx0zz
Level 36: http://www.wowhead.com/?talent=sZVbtIx0zM
Level 37: http://www.wowhead.com/?talent=sZVhtIx0zM
Level 38: http://www.wowhead.com/?talent=sZVhtIx0zMo
Level 39: http://www.wowhead.com/?talent=sZVhtIx0zMb

VERY IMPORTANT:
Level 40: http://www.wowhead.com/?talent=sZVhtIx0zMbo
Level 41: http://www.wowhead.com/?talent=sZVhtIx0zMdo
Level 42: http://www.wowhead.com/?talent=sZVhtIx0zMro

Level 43: http://www.wowhead.com/?talent=sZVhtIx0zMrk
Level 44: http://www.wowhead.com/?talent=sZVhtIx0zMrR
Level 45: http://www.wowhead.com/?talent=sZVhtIx0zMrRo
Level 46: http://www.wowhead.com/?talent=sZVhtIx0zMrRb
Level 47: http://www.wowhead.com/?talent=sZVhtIx0zMrRh
Level 48: http://www.wowhead.com/?talent=sZVhtIx0zMrRL
Level 49: http://www.wowhead.com/?talent=sZVhtIx0zMrRx

VERY IMPORTANT:
Level 50: http://www.wowhead.com/?talent=sZVhtIx0zMrRt
Level 51: http://www.wowhead.com/?talent=sZVhtIx0zMrst
Level 52: http://www.wowhead.com/?talent=sZVhtIx0zMrat
Level 53: http://www.wowhead.com/?talent=sZVhtIx0zMrqt
Level 54: http://www.wowhead.com/?talent=sZVhtIx0zMGqt
Level 55: http://www.wowhead.com/?talent=sZVhtIx0zMTqt
Level 56: http://www.wowhead.com/?talent=sZVhtIx0zMgqt
Level 57: http://www.wowhead.com/?talent=sZVhtIx0zMgqtz
Level 58: http://www.wowhead.com/?talent=sZVhtIx0zMgqtM
Level 59: http://www.wowhead.com/?talent=sZVhtIx0zMgqtc
Level 60: http://www.wowhead.com/?talent=sZVhtIx0zMgqtm
Level 61: http://www.wowhead.com/?talent=sZVhtIx0zMgqtV
Level 62: http://www.wowhead.com/?talent=sZVhtIx0zMgqtV0o
Level 63: http://www.wowhead.com/?talent=sZVhtIx0zMgqtV0b
Level 64: http://www.wowhead.com/?talent=sZVhtIx0zMgqtV0h
Level 65: http://www.wowhead.com/?talent=sZVhtIx0zMgqtV0L
Level 66: http://www.wowhead.com/?talent=sZVhtIx0zMgqtV0x
Level 67: http://www.wowhead.com/?talent=sZVhtIx0zMgqtVox

After that, its an open game with what you've got left. Some tankadins get Reckoning. I don't - and you can see other threads for the arguments for and against that (please don't duplicate them here).