Social media firm Shozu has updated its iPhone app with a feature letting people order prints of their photos.
Users can print photos and have them mailed anywhere in the world within 24 hours, via a deal between Shozu and Touchnote.
However, the most interesting thing about the app is that it's one of the first to make use of the new in-app payments feature of Apple's iPhone 3.0 software.
Users pay for the printing within the application, and are charged by Apple through their iTunes account.
Shozu says that it plans to launch its mobile app through other app stores later this year, including Windows Marketplace for Mobile, Ovi Store and BlackBerry App World.
None currently support micropayments, but Shozu says it will include the printing feature if that changes.
"There's the potential of big money in micro-payments, which is why Touchnote's mobile business model is focused on licensing its enabling library to other iPhone developers," says Touchnote CEO Raam Thakrar. "Shozu is a perfect partner."
One question is just how popular the new feature will be, given that the Shozu app also allows users to share photos digitally with friends via sites like Flickr and Facebook for free.