Thanks for the reply. I hadn't even considered the time factor in a larger game, but that makes sense. The simultaneous game setup sounds like a good idea.
I'm also going to look into the party games mentioned in the OP (Time's Up, Wits & Wagers, and Say Anything). They all sound like big potential hits.
Get Resistance or Avalon. They're an incredible amount of fun, especially if your group is decent at lying/deceiving. ;P