Personally, I like a two hour event with an hour for social and an hour
for either a couple of demos (up to 30 minutes each), a presentation
(technology or entreprenpreneurial related), or panel discussion. If
you're interested in demoing, giving a presentation, or have a hot
topic to discuss, leave a note here or email.
http://needmoredesigns.com/notes/297/business-tip-run-rails-at-home
Basically, about how useful we've found it to run a simple web
application server internally with a number of applications, and how
you can set something like this up in a half hour or less for your
business. Best of all, if you don't like the application itself it's
really really easy to tweak it, and as you learn from doing that, you
could parlay your knowledge into public product releases. Something
like that!
We should get a page going for topic ideas.