Originally Posted by Venturi 
They're snubbing Pentax on compatibility list too.
It's actually a rather novel (and I'm sure profitable for Panny) idea. Could be fun for kid's parties, etc.
It won't work on Pentax cameras? I hope it'll work on the K7.
Some of the best travel photogs in the world use these, it's a great way to give a print to someone you take a photo of. Great way to interact with locals.