Stellaris Launchpad and TM1638 based seven segment LED display
TM1638 based display modules are found dirt cheap on ebay and dealxtreme. These displays require only 3 I/O pins of a microcontroller to operate. Although they are 5V displays, Dan showed in this tutorial that they can be used with 3.3V platforms such as Stellaris Launchpad. He has published his TM1638 display driver routines for Stellaris Launchpad on Google code.
TM1638 display library for Stellaris Launchpad