Usually a lot of things don't work right on Linux, but Samsung printers aren't one of them. I used to have a CLP310N that never worked right in Linux, it would print strange lines over pictures or with some programs, no picture at all. I was using whatever the default driver that Ubuntu found.
Now I upgraded to a CLP-365W which is basically the same thing with wireless but no driver from Ubuntu (eg CLP-350) works. I was forced to go to Samsung's site and was surprise........
I kind of expected this feature to be there in some form, to stay ahead of the pack Apple needs to stay on top of this. User's of HTC's Android smart phone which uses a Linux based OS with Google's power behind it, note that you can save passwords in the browser on that phone.
Apple needs to continuously evaluate the needs in its core apps and make sure the features are cutting edge and top notch, if other phones come out with some of these seemingly small but essential features........