I have a Canon Powershot S400 that I bought in New York last year (it's called Digital IXUS 400 in Europe). I'm extremely pleased with it, it produces excellent 4 megapixel images. The only negative thing about it is that it doesn't have a lot of manual shooting options, so if you like to tinker with shutter speeds and aperture sizes it's not the camera for you.
I don't use it at all with my Amiga (I rarely use it at all these days) so I can't comment on how compatible it is.
I use a Canon i865 printer on my PC to print the photos on 10x15cm (4"x6") photo paper and they are indistinguishable from real photos developed from film.
