MacRumors:

Lifeprint, a company known for its iPhone-compatible ZINK photo printer, recently introduced a new, larger photo printer that’s able to print images that are 3 by 4.5 inches instead of 2 by 3 inches, the normal standard size for mini printers designed for the iPhone.

The new Lifeprint 3×4.5 Hyperphoto Printer for iPhone, priced at $150, is an Apple exclusive that’s designed to give customers a quick and easy way to instantly print their iPhone photos.

Good review of the pros and cons. I’d love to have a “quickie” printer for on the go prints but the downsides of the low picture quality and hugely expensive paper make these kinds of printers a no buy for me.