On our last day, Dan (co-worker) and I spent the afternoon at the Hilton at Star Trek - The Experience. It's an all-out Star Trek world, featuring the 'Klingon Encounter' and 'Borg Invasion 4D' motion simulator rides, an all-access backstage tour (no pics!), a Star Trek museum, and Quark's Bar & Grill. We had lots of fun, and it was definitely the highlight of the trip for me!
EDIT: 2006/11/03 Added pics of souvenirs at the end.