I was thinking about adding in a function to allow the user to accept Credit Cards through there app I have looked at two different API and it seems that both use actual Java
http://www.payanywhere.com/support/
and
http://www.innerfence.com/apps/credit...
This one uses a web interface and curl service calls
https://www.wepay.com/developer/faq/p...
Any ideas on what would be best it would be real nice to be able to use a card scanner as the first two does