[Freeswitch-users] Calling Card System Setup - Suggestions for New Setup?

Hi, I'm setting up a calling card system with FreeSWITCH. Figured I'd ask before setting it all up- Does anyone have any suggestions, or scripts, that they use for auto-login or for logging in users to check their balance? Any specific pitfalls to worry about? I figured I could bypass media once the user places their call. Is that a bad idea? And.. any suggestions for payment processors other than paypal - some people signing up won't have internet, their CC will have to be manually keyed in. I've heard one place suggest authorize.net Thanks! -Avi