Very cool. I've been thinking about something like this (asynchronous message transfer) lately. I would want to use good public key crypto for message signing a

Very cool. I've been thinking about something like this (asynchronous message transfer) lately. I would want to use good public key crypto for message signing and encryption. If it was built as a pass-the-note game (with points, achievements, etc...) that ran on phones and could talk to other phones via bluetooth and wifi, I could see it getting pretty popular in schools. The protocol should also support transfer via thumb drive (dead drop) and internet (if available).