Zheng your Canon Compact

Make your Canon compact take HDR and RAW photos!

http://chdk.wikia.com/wiki/CHDK

Here's a guide on how to take HDR pics after installing CHDK
http://paulstamatiou.com/how-to-get-started-with-hdr-photography-part-2
http://www.websaytko.com/3418-making-hdr-image-with-photomatix-and-chdk.html