It's not a polished article by a long shot. (it contains a new look I'm working on for my site at) To see the Elephant Web Server / Gateway with the possibility for use also as a home automation controller; click on the Elephant button on the left hand side of the page. If you have a Cable / DSL modem then this article might be of interest. (It replaces your router) I've been using one for about a year, just wanted to share how it's done. Total cost with software is less than $220 Canadian. You can program it in Perl, PHP, and more. You configure it with your browser. With a little programming you could connect it to any serial based home automation devices and control / monitor them from anywhere. Hey it's cheaper and far more capable than a Stargate Web-Xpander $299 (Rabbit Based Ethernet to RS232 device).
Ultimately I would like to control the Cricket Thermostat and all the other communications enabled devices on my site. As I have the firmware I'll release as open source (GNU Hardware, firmware) I think this way we can all benifit and get very reliable HA devices around the home.
Bill(*look for the Projects / Elephant tab)