Bitcoin clients should have a built in simple message encryption/decryption system, perhaps based off of your actual Bitcoin addresses themselves.
This would make doing trades on sites like biddingpond much easier, since you don’t need to both agree on a separate app like PGP before communicating over email.
Most of the time I bet people don’t even bother to use encryption, but I think it’s a good idea to use it when doing trades in Bitcoins.
Thoughts?