If you're craving more interview with him, there's a pretty interesting podcast with patrick hosted by vox's Ezra Klein. it was useful for giving lots of context to somebody whose tweets i had spent a fair amount of time reading but who i didn't really have a grasp on (other than knowing about stripe): https://soundcloud.com/panoply/eks045-patrick-collison-ads
I am confused about one thing in the interview. He implied that when they launched they didnt have a backend integration with a merchant account (assuming that is how all this stuff works) ... so you would eventually get your money. (implying there was a manual step that required human intervention)
It sounds like the beta was only half built, but I am surprised that it didnt need to be 100% there for it to process payments.
I love what Stripe has done / is doing with Atlas. I can barely even explain what a pain it is just to open a US bank account with a foreign address. If they can succeed on a broader level, it will democratize online commerce like WordPress did for online publishing.