I'm in... sounds like a hoot!
I propose we all bring a prop, ie cloak for thief, staff for wizard, sword for fighter ect. We don't have to all dress up, just an item to look authentic...
Also did you guys see the clip on LARP? looked pretty cool when the knight smite the guy from Tech TV.
http://www.techtv.com/xplay/features/story/0,24330,3494821,00.html