In case you are running out of geeky things to do with gadgets you could try wire a PocketPC to an Ipod to allow wireless file swapping to anyone within range of your wireless. Even if you poo-poo illegal file swapping, there are some things of interest here: namely, the use of Apple’s Rendezvous/Zeroconf/Howl stuff to discover and broadcast availability of web services from the Pocket PC. Since I don’t have a PocketPC, this hack is of limited use to me, but I think that in the future Apple’s Rendezvous technology will be more widely deployed, especially in setting up impromptu networks.