Fall Line Studio is a start up studio of Disney's Disney Interactive Studios. It is based in Salt Lake City, Utah, and is the sister studio to Disney's Avalanche Software, also based in the city.
Fall Line Studio is dedicated to releasing games based on Disney characters, television shows, and entertainment franchises exclusively for Nintendo consoles such as the Nintendo DS and Wii systems, in addition to original titles. The company also helped develop Disney's upcoming DGamer network.
Source: Wikipedia, "Fall Line Studios", available under the CC-BY-SA License.