Honeyledger is in the process of coming up with their own way to take payments from viewers that doesn't involve PayPal at all. I know I will be using this and it would be really nice if it was able to pop up on the screen like it does with normal donations/tips. I'm including a link to HoneyLedger's API but apparently it's still under active development. Hopefully this becomes a thing because HoneyLedger is supposed to help streamers protect themselves against charge backs.
Honeyledger's API
http://honeyledger.github.io/slate/
