Carl,
Take a look at the museum site here:
http://www.earlytelevision.org/2010_convention.html
At the bottom of the page are links to pictures and some videos of the past 6 conventions, you can almost get the feel of being there.
If you're into TV you have to go at least once, it's the only place you will ever get to see, touch, and play with some of the earliest and rarest of TV technology.
Chuck