Oh man, this brings back memories of when I was in high school. I'd bring my clamshell iBook and do my work on that while the others used the computers in the lab. When we needed to print, I could just hook up an Ethernet cord from an unused computer and print right from the iBook. It recognized pretty much every PostScript printer on the network. Definitely paid to be one of the IT guys at that school!! (I was also the first student to take part in "bring your own technology").