It is our intent to have a PGP key signing at some point during the conference. SanderTemme is, at least in theory, coordinating this event. He did a great job of this last year, so I presume that it will be similarly successful this year. However, we don't, at this time, know exactly when that event will take place.
Sander?
If you'd like to read all about a key signing, there's a [http://www.cryptnet.net/fdp/crypto/gpg-party.html HowTo] which is a good place to start. If you don't know anything about pgp/gpg at all, you should probably look [http://www.pgpi.org/ here]
At some point, I'll generate a web of trust graph of the people involved in the key signing. Because pretty pictures are cool, that's why.