Well, if you want wide angle, there are not that many choices. The widest angle P&S camera is the SD980 (22mm wide in RAW mode, 24mm in jpg).
I have a beta CHDK implementation for the SD980 firmware 1.0.0c (however there are some new versions not supported yet).
Also take a look at SDM, it is a spin-off CHDK special for stereo photography (the SD980 is not supported by it yet).