If you're more of a Discovery Channel fan, Deep Sea 3D, Grand Canyon Adventure, Under the Sea 3D, and Dinosaurs Alive! will be right up your alley. Occasionally the 3D floating particles in the ocean will make you a little seasick, but otherwise these films will show off your 3D TV nicely.
Lastly, you might consider a couple of it's-not-my-place-to-judge-but-they're-bad movies--such as Clash of the Titans, Step Up 3D (available December 21), and Resident Evil: Afterlife (available December 28)--that at least some people will enjoy.
3D Broadcast Channels
Perhaps you're more of a sports fan. Or maybe you just don't want to worry about a 3D Blu-ray disc player. Either way, you have (limited) options if you're looking for 3D broadcasts.
Comcast offers ESPN 3D, which shows select 3D programming. This means that, unless you're a big college-football fan, most of what you'll be watching is a fetching yet boring ESPN 3D logo. ESPN has guaranteed 85 live sporting events in 3D for its first year; let's hope that it will have more events next year.