I've gone to about 8 of them. You can learn a lot when you're there. But in Boston expect a TON of people...like 200+ Also they serve you pizza which isn't too shabby seeing how it's free. Expect a lot of hardcore Linux geeks.
I love going to code camps because the networking with others is great.
I started going to code camps in college and I loved the freebies they gave away back them (they weren't as well known). I did get a few free lance gigs from the code camps too.
Are you from the Boston area? It'd be great to get another niner invovled in the Boston tech scene.
I can't go to this code camp because I'm going to be in Australia next week....me'h.