I am not a fan of Trivial Pursuit, or really any of these types of game really.... until I played this. Play with a bunch of friends, one of the few "family-friendly" games on the PS3. It really is surprisingly good fun, and it gets quite personal when a loved one picks you as their target for a pie-in-the-face.... but then you laugh it off and play again.
The wireless buzzers make it much easier to play, everyone gets to sit on the furniture, instead of squatting around the telly on the floor. The buzzers come with a USB dongle that plugs into the front of the PS3 (I believe the buzzers work on the PS2 also) and I prefer these ones (appearance) to the ones you can buy separately. If you are looking for a game-night game for a mixed audience, this should be on your list.
Note: Because the controllers work via a dongle, they do not use up your small 7 BlueTooth controllers/accessories limit on the PS3.