RaduP, yes I do know C and a wealth of other languages, also assembler for some processors, maybe a bit rusty... Also knowledge of cross compiling and ARM toolchain. However no experience with the Canon firmware YET. Do not even have the camera yet, but I will next week. Massive amount of other thing to do like everyone
but committed to get the Canon Powershot SD980 IS a.k.a. IXUS 200 IS in Europe, IXY DIGITAL 930 IS to work with CHDK.
RaduP, indeed some guidance really appreciated... so I bet now it is reading the Wiki for developers next week.