You can see some talent trees in action for level 60 characters to get an idea of how people are dividing up their 51 Talent Points.
Druid         Buxton         Thunderhorn
Druid         Datoy         Warsong
Hunter         Zugdaga         Feathermoon
Hunter         Jaqra         Aggramar
Mage         Matril         Malygos
Mage         Riven         Dunemaul
Paladin         Krondar         Aszune
Paladin         Faethe         Icecrown
Priest         Kilson         Frostmane
Priest         Nargon         Mal'Ganis
Rogue         Shintok         Llane
Rogue         Milly         Hellscream
Shaman         Profesor         Kor'gall
Shaman         Chemosh         Spinebreaker
Warlock         Hurg         Turalyon
Warlock         Kyosus         Al'Akir
Warrior         Saintonenl         Doomhammer
Warrior         Wallwar         Dalaran