We started with Camgirlslive a long time ago (when we still had to pay 2500 bucks to be part of their network - Yeah believe it, ask Lars - Hellonetwork - etc etc). However the income rocked!!
http://www.camgirlslive.com
We than started to us Homegrown which was also very good to us (before Homegrown we were with Rosecam - same difference)
For a provider who does not want to be stuck with a site, Members and crap my advice is Camgirls Live
If you are an Amateur with a site my advice would be Homegrown or Camz.com -
Good luck