I believe there's Security, Registration, Panel, Vendor, Live Events, Video Gaming room, and Video room positions. I believe newer volunteers gets to dip their feet in the water and try out all the positions. I'm a really tall guy so I wouldn't be surprised if I were to do Security and the setup/tear down of the vendor rooms and whatnot.
The venue is medium/small sized. The con has been going on for 10 years now and has reached upwards of 3,000 people over the entire course of the weekend sometimes. I'm expecting this year to be a little over 2,000 for the weekend.