Originally Posted by Mutt

depends on what you want to do - the simplest way is with Windows Media -
any decent host should have a Windows Media server or can set you one up - the model just uses Windows Media Encoder software to send her video stream to the server where it gets broadcast. if you're charging by the minute - that can get more complicated if you want it automated - if you don't need it automated the member can send the girl an email or IM to set up a time for the show, he goes and pays for a block of time through CCBILL.
there are off the shelf cam systems like Firecracker if you want something fancier and are going to have a bunch of models working - Bluewire Studio also has a Flash based cam system that looks very good - I'm told LiveJasmin uses a customized version of it.