check out
http://www.pittspeed.com/forums/calendar.php?do=getinfo&e=26&day=2004-9-25&c=1
you now have the power to say that you are attending. This should clear some confusion and not make a million threads just to see who is coming!
mods and admins have the power to create an event on the calendar and one of the options is to enable roll call.
enjoy!