This is a mirror of the CHDK subversion repository. The master branch should track the CHDK trunk. The emlyn-base branch contains changes that should not be pushed back to the main CHDK repository (things like Canon firmware dumps and FI2 keys). The emlyn-general branch contains general changes that might be useful for the main CHDK repo, and are not camera-specific (things like fixes for compilation on Mac OS X, and some useful scripts). The ixus130 branch contains the actual port.
You can follow progress in the porting thread at the CHDK forum.
The CHDK wiki page for this camera is here.