Got it right before I got my 30D, which is not compatible with it. The 20D *used* to be, but they've taken it off the list. http://www.apple.com/ipod/compatibility ... ector.html You need an iPod Photo or later to use it. If your camera supports PTP file transfer via USB it will prob work. My S1IS works...most of the time. Idea is great, but I'll be honest - a USB 1.1 card reader to a Pentium II laptop would probably be faster. But if you want something to back up a P&S in the field (it's really small) it could (again:could) be useful. I'll pay for regular USPS! But I won't guarantee delivery. I still have the original box. I'm doing this because I'd rather see it go to some one who would/may/want to actually use it.