I've added two example LaunchPad projects so you can try out Mercurial.
Pull the latest repository and you'll see LaunchPadTempDemo and LaunchPadBlinkLEDs.
The first is the sample code programmed onto the 2553 chip when you received your launchpad.
The second is an example of blinking both LEDs on the launchpad.
Pull the code, make some changes, push the code back. Then look at the sourceforge web interface to our code and see if your changes are in our shared repository.
Sourceforge supports three version control systems: Subversion; Git; and Mercurial.
After several hours of reading, looking through the tutorials, and hunting down critics of the systems I've selected Mercurial.