I want to build a PC for the first time, and I'm thinking about using Ubuntu instead of Win 7/8. Is there a way/website/method to test if it will be compatible with my printer, wireless keyboard and mouse?
probably easiest to create bootable media and just test it out.
Ubuntu and its derivatives have a LiveCD option where you can boot into Ubuntu off of the CD (or USB). You can test out your hardware that way without actually having to install the OS. Not sure about other Linux distros.