Twitter Math Camp 2012 was an amazing experience, and all teachers should get to participate in this type of professional development.
If you want to learn about the history of TMC12, you can find the original site here, or you can read the mirrored pages on this site.
Genesis of TMC12
Program of Events
The MathCamp Shirts
TMC12 Wiki site
Pics from TMC12
If you want to see the list of attendees, they can be found on Lisa Henry’s blog here.
If you want to subscribe to the Twitter List from Sean Sweeney, you can find that list here.