"The festival is an opportunity for the Ubuntu team to show normal computer users how easy using the Linux software has become. Volunteers will be on hand to answer questions, present demonstrations and help users install the free, open source Linux operating system. Ubuntu CDs, case badges, drinks and snacks will be available."
The case badges are pretty nice. I put one on my laptop a week ago and already people have asked about it.
I think I'm going to be bringing my laptop and depending on what's going on, I will demo Miro.
See the wiki page for more details (date, time, location, press release, ...).