You might want to go check out the sticky. I mean, it's not going to teach you how to play, but I'm sure you'll be able to absorb a lot of useful information. I wrote a section about arena that's in it, and that can give you some good information, though it's slightly outdated, and not really meant for pre-80 PvP.
Edited, Dec 23rd 2009 5:41pm by Yuppley