In my experience, mass key-signing on a few laptops is a waste of time. It might be a fun waste of time at a convention, but it made the one Washington Cypherpunk meeting to date kind of a drag. Far more efficient is to print up a paper certificate with your key and its fingerprint, run off a bunch of copies, and sign them. Pass them out and let people verify your credentials; everyone does a batch signing when they get some free time. Then everyone mails their key ring to a server, waits a few days, and collects all their new signatures off the same server. But, again, maybe that takes the fun out of it. To each his own... Joe