One of the best tanking weapons you can get without raiding is the mace arena reward, [wowitem=32963]Merciless Gladiator's Gavel[/wowitem]
However, if you start getting arena points now, it would probably be more beneficial to wait for season 3, as there will probably be something even better.
Edited, Oct 22nd 2007 4:07pm by CapJack