wow-loot is great, but only deals with Outlands instances & zones. The OP said he wouldn't be getting TBC for a month or so.
I'm no expert on high-end Azeroth gear, but from my LW, the
Black Dragonscale set was my goal (well until I never got to BRD and thus, never got the recipes).
I wouldn't recommend using too many PvP points on armor at 60, when you do get TBC, Outlands greens will blow away anything you have and those points will be wasted. Save 'em for 70 (or maybe even 80).
I would think 59 would be a pretty empty bg zone, though. Folks blow through 58-59 so quickly, they rarely take time to PvP.