I've watched Ryan Bate's rails casts on PayPal integration. I've even gotten it to work with a Rails 3.1 test app and PayPal's sandbox.
However, the approach highlighted in the rails cast is more for end-users paying YOU (your business). What if you need to to send money to your customers? Is there a tutorial / video / documentation on how to go about this?
Ideally, I would like to use my Paypal account to send money to a customer's bank account which in some cases may not necessarily be Paypal owned.