most canon selphy printers does not work under linux, but i think its possible to send files to a selphy printer via bluetooth. and after recieving the file, it instantly prints the image. my question is, is there a way to send files from a pc to selphy via usb instead of bluetooth. i believe you can use obexftp to send files from pc->selphy and it will instantly print, the problem with this approach is that it takes a lot of time to send the file. if there is a way to use a cable to transfer the files then we could print directly. or is there a cable that somewhat simulates how bluetooth transfers.

Huh...from the OpenPrinting site, most of them DO work:

http://www.openprinting.org/printers...acturer/Canon/

Might help if you told us what model of Selphy printer, and version/distro of Linux you're using. I've used the Gutenprint drivers, as well as the ones from Brighthost, to work with the big Imagerunners, and have had all of them work.