that would be really cool - i am after something like SpyShield (
http://www.commandcode.com) from Command Code which only works in MSN Messenger upto version 5. So i have to use windows messenger if I want to use it, or encrypt outside and paste the PGP encrpted message into the message window. and have the receiver decrypt outside.
So my point is on the fly PGP encryption and decryption of messages would be really useful, especially if compatable with SpyShield. Cos then we can send passwords by MSN