RiscIt writes: "This technology has been around for some time ... Ethernet-protocol-like networking for model trains. LocoNet was created by DigiTrax. It is meant to work with their DCC systems, which can control trains and most everything else on a layout without hundreds of toggle switches. DigiTrax has posted a basic description of the technology as well as the protocol spec in pdf format. Very cool. I'm not about to go buy a gigabit switch for that train under the Christmas tree, however." Not sure why everything is underlined on that site, but I'm sure the headache will fade. Considering the influence of model trains on early computers (as related in Hackers and other books), this is one of the coolest instances I've heard of turnabout-is-fair-play.