Here is a list of camera models we know about, those we think we understand, and those we're still working on. The introduction dates come from DPReview.com. The list is here to give you some sort of idea of how current this document is. Notice that the PowerShot S and SD series cameras are usually called that only in North America; they are generally "Digital IXUS" something in Europe and most of Asia, and "Digital IXY" something in Japan. I suspect it all has to do with trying to beat gray-market imports. Usually these brothers under the skin will share a USB product ID, but some early cameras (e.g. PowerShot S100 aka IXY Digital aka Digital IXUS) have different ID's.