yes, it's a Midgard module and it works together with your maemo.org profile.

In order to organize things we need to request registration. We are aiming at 300 people and we should be able to host more appropriatedly if they register well in advance. People popping up in the last minute should be able to join the sessions but things like food, shirts etc might not be granted.

The merchandising thread is better for shirt size discussions.