I bought one at Office Depot yesterday and it works even as a web cam via USB. But the software is a hassle. When I plug in a memory card (like one in a usb thumb drive) an 'Image Capture Extension' starts and calls Camera Window Software which then calls Memory Card Utility.
To keep the ability to download pictures from the camera via usb, but not have this application grabbing my sd cards and running all sorts of software, I archived the Memory Card utility and then renamed the original. The process still starts, but quits when it can't find the MCU.
The camera download via USB can still be called from yet another piece of software that came with the camera.
The Canon software takes 250 MB of space
. The only thing that looks useful is the stitch utility, to let you make a panorama of smaller pix.
The camera also came with a 16mb sd card
The fine print in the user book says that that chip 'may' not allow the full use of the camera.