Tony, it was a while ago, but I think I remember it being mentioned on the BBS but googled someone who had already documented it. ISTR choosing the right value of thermistor took a couple of goes to get right and I did need 2 of them for it to work.

Hugo, I have a couple of those ethernet shields which I was using for a remote control satellite dish positioner and I agree they are pretty cool, although at the time you had to hack the ethernet library to support UDP.

Funnily enough, I might have to put some temperature sensors in a new project I'm working on. So the plan is to use the same 1-wire temperature sensors and run a cut down SNMP stack on the arduino. I'm using the new 32KB atmegas so there's plenty of space for code. If not I could alway use the new Arduino Mega which is pretty neat. Although I had an early one which meant I had to replace a cap on the board to make it auto-reset properly. It's supposed to have been FITNR. I think that would be the coolest way to do it.