I only learned of the existence of CHDK yesterday, but I did some digging through the FAQ and forums since this camera is on my short list of ones I might buy.
The Ixus 80 IS / SD1100 IS uses the new DRYOS OS according to the
For Developers - CHDK Wiki.
The good news is the first couple of cameras using DRYOS have been ported successfully, with some limitations, so I think there is nothing theoretically stopping this camera from eventually getting included. The bad news is I have not seen any mention of work being done on this particular camera yet.
If I've understood what I've read, the first step is someone getting a firmware dump from the camera and making it available. If you have some technical proficiency, consider buying the camera and getting the ball rolling. If the steps are a bit too involved, however, there is nothing to do but wait and hope someone else decides to tackle it. There is certainly no shortage of talent here.
