Joe Baskerville (Cogapp's Head of New Technology) and I went to Washington recently for the annual conference of the Museum Computer Network, where we were each presenting in a session.  MCN is always one of my favourite conferences to attend, not least because it is quite small, non-commercial, and most of the attendees are hands-on doing things with computers for museums.  So it's very friendly; and technical without being ludicrously geeky or divorced from practical uses for the technology.  As witness, my favourite slide of the conference (from an excellent and very well attended session on the Semantic Web from the Met's Koven Smith and Don Undeen):