When I played last weekend (not sure if there was a new build or not) all the PVP gear came from the boxes you could buy from the PVP vendor. It would grant a random PVP item, and the boxes were made for certain level, such as the 70 valor point item got the level 20ish gear, and the 150 valor box got the level 30 gear, etc. Again, that could have chanced, but that's how it was last weekend.
---------- Post added 2011-11-19 at 01:14 PM ----------
I'll better explain that, I meant to. You que up and it picks 7 other players, and puts you in the BG, and then it finds the average level and brings everyone to that HP mark and will buff/nerf you base off that, and makes all damage equal etc.
Example, I was level 12 and had like 2k hp or something, and would normally hit for 200. When I went into the BG I had 12k hp and was doing normal hits for 1k.