Never done an "unconference" before, but it was interesting. They had me talk on IPv6, and lasers. There were quite a few interesting talks, including stuff on Python, DNSSEC, Puppet, and even DNA sequence analysis. Shame we don't have DNASEC :-)
The agenda is not set, and instead is decided as the day goes on, which seemed to work well. The event (hosted by BCS off The Stand in London) ran perfectly to time.
The Coal Hole afterwards was packed, but they do serve Aspels, so not bad.
Thanks for the warm welcome to a newbee, and the feedback.