I have been thinking about this for a while now. Say you have two computers and wanted to do a file transfer between them. You are not connected by a router, but you have a USB cable, and an Ethernet cable available to you. Could you just directly connect the computers together with one of these cables without a router in between and have access to the files of both machines-assuming no firewalls, etc. to impede it? I ask this because I am curious as to how you would load a movie or music file into a Netbook, most of which have no optical drive. I am considering getting one in a few months as it would be easier to carry around school than the 17 in laptop I have now, and would be a nice ultra-portable machine to use on the go.