Not many people trust Tankadins, (although I think many of them can get the job done), but there are many paladins who just dont feel like healing any more, i cant imagine why. Here is a good guide too ubtaining pre Kara gear and a pretty decent tanking guide all together which I think is pretty complete. Enjoy!
WoW Forums ->
This guide was not done by me, it is simply a post on the WoW forums that I found was quite complete.