> PGP encrypted letters recorded in your unit for reception by some other
> person attending the same meeting. Encrypt by the recipient's public key,
> and the letter is exchanged without you even knowing which individual it
> is.
How about a wireless wearable distributed mail system. I store a letter with
an e-mail address in my active tag/badge/whatever, it's sent randomly to
people I meet throughout the day, and then from them to people they meet and
so on until it reaches its destination. Sure, it's slow but it must have
some application.
--Wax