On Webcams.com assuming you will use your microphone you'd make about $50 - $100 per hour. Our rates are $2.99 per person with 40% to model. That isn't that high of a rate but we have a LOT of customers.
You can sign up here:
http://webcams.com/index.php?action=NewModel
Shoot me an email and I'll get your account approved promptly. Else it will be approved within 8 hours of sign up by someone.