I think this is the first time I write in this forum, so I'll introduce myself. I'm Antonio, a photographer from Spain. I love street photography, and like to carry my camera with me all times. Thus, a small but full-featured camera like the PowerShot A720 is ideal for me. You can see some of my photographs at
http://www.flickr.com/photos/ajgelado/. In the "real life", I'm a computer programmer.
I own two Canon cameras, an A710, which (sadly) has a broken lens cover, but otherwise works correctly, and a newer A720. The thing is that I like night photography, and thus, reading about the ultra-long exposure mode made me happy. It came to the A710 pretty quickly, but it isn't available (yet) for the A720. Is anybody working on it?
If not, maybe I can help. I only have experience at "user level" with CHDK, nor with ARM assembler, but I know 6502 and 8086 assembler, and can (of course) read and write C code, in addition to having some low-level debugging skills (from my days of programming the Apple II directly in machine code!). I think I just need some direction on where to look and what to do. I'd like to contribute to CHDK, if only a bit, in exchange for all the times I have used it :-) .