If you want to have it, you or someone else has to make a port for it. It's not that hard to port it, as the operating system inside the camera is DryOS 2.3 which is also used by the A720 and several other cameras. A720 is especially well supported by CHDK so a good amount of work would be just adapting the current code. If you have some spare time just create a thread on the forum and ask questions.