What about Twitpay? Zong? Square? GetGiving? Hub Culture? No?
Readers may find fascinating the cover story in the March 2010 issue of Wired magazine (cover pictured in part), entitled The Future of Money: It's Flexible, Frictionless and (Almost) Free. A teaser from the article:
PayPal is just the latest company to try to harness the creative powers of the open Internet. Google created a platform that lets anyone buy or display online advertisements. Facebook allows any developer to write applications for its social network, and Apple does the same with its iTunes App Store. Amazon’s Web Services provides developers the cloud-based processing power and storage space they need to build applications and services. Now PayPal has brought this same spirit of innovation and experimentation to the world of payments. Your wallet may never be the same.
Hat tip: Billy Saqr, one of over 75 students in my Payment Systems class this semester.