Burning Angel has a lot more scenes these days, and has a couple of affiliate sites, now, too. Still predominated by tattooed and pierced girls, so if that's your thing...

I don't know much about the others, except that I was on Melissa Ashley's site for a while, and it wasn't very good. I feel sorry for her and all, and I wish her well with her medical condition, but it's mostly stills (nice ones, though) with a few VERY poor quality scenes. Plus, access to the site occasionally disappears for no damn reason.

I didn't know Piss Mops was gone. That sucks.

Crack Whore Confessions (I think it's called something else now) always had a train-wreck fascination for me. Nine-tenths of the girls were horrid looking, but there were a few genuine cuties. And they all had the most god-awful histories... just too horrible and bizarre to stop watching, really.