last in Birmingham, AL, was the TechMixer Expo, downtown in the McWane Science Center.
with 700+ Pre-registered attendees, and appearantly many more that just showed up, my suscipions are that the show had well over 1000+ attendees.
we were there with the Bham-LUG booth, for linux and FOSS. i had my laptop on display. i enabled the xgl / beryl grapics for added eye candy. other guys from the group brought their personal OLPC XO laptop, we had probably 5 on display at any given time. we had 50+ live cd’s available, and only 3 left at the end of the night.