South Dakota seems to be popular in movies and TV right at the moment, even if the projects are not filming here.
"Warehouse 13," a new original series on the ScyFy Channel is actually set in the Badlands of South Dakota, even though as far as I can tell it was filmed in Canada. The basic premise of the show is that the federal government collects items that have some sort of power to create unnatural and/or dangerous events and situations. These artifacts are kept in a secret warehouse in our very own Badlands.
Although the Badlands don't look quite right, the bed and breakfast "seven miles away" doesn't look like anything in the area, and the cow that wandered through an early shot wasn't the type of cow you would see anywhere near the Badlands, the show itself doesn't seem all that bad.
More info at the SyFy website. There are some interesting discussions going on at SyFy's forums, including one about how rural and "hickish" the show makes South Dakota seem.
On the big screen, I was pleasantly surprised to see Sioux Falls mentioned in the new Johnny Depp biopic "Public Enemies." I knew that the subject of the movie, gangster John Dillinger, had robbed a bank in Sioux Falls but I had no idea it was as important to his story as it is. Wisconsin filled in for South Dakota in the filming of "Public Enemies."
The movie's official website is Public Enemies. TruTV's website has an interesting telling of the Sioux Falls robbery story here. The Sioux Falls Argus Leader has an online interview from 2004 with Dillinger hostage Mary Lucas Hawkins here.