Thanks, Gorgonops, for those great ideas. Software and I parted company when the goto statement was outlawed (a legal condition of getting my graduate degree was that I not write code), but would it be correct to say that the easiest thing might be to use WiFi ad hoc mode to communicate with, say, a PC set up as a PPP server? I'm trying to imagine how to cobble something together without requiring (much) software creation.