It wasn't anything too extravogant. All we really did was have a bunch of Turbo systems and games on display (Turbo Duo, PCE+CDROM2, PC-FX, Super Grafx, Turbo Express). Me and one of the coders here (tomaitheo / Bonknuts) made a special Pong demo for the 2008 fest called Turbo Pong . If you're able to get in touch with tom, he may be able to make a 2010 edition
(we had a bunch of ideas to add to it, but didn't have enough time to implement them).
You can find some pics of the previous Turbo Fests on these articles I made:
MGC 2007 ,
MGC 2008 .
Definitely going to look into coming to the VGS!