Dear Blick, Felix, Herb, and WeatherCat gadget fans,
Thanks for everybody's interest. After I made that post I went through the list more carefully and didn't find anything all that useful ultimately. I suppose the ways to integrate into home automation might be interesting, but I'm around most of the time so there is no need to automatically set the thermostat or anything like that.
Something I might want to do someday is use an number of Open Sprinkler setups and adjust that using data from WeatherCat:
https://opensprinkler.com/There is software for the Mac that will control these sprinklers:
http://www.macupdate.com/app/mac/51757/opensprinklerHowever, it uses it own weather data and doesn't seem to support AppleScript. So this is a project that won't happen anytime soon.
For $149.99, This could be adapted with power and parts to spare!
This one is a bit pricey, but a lower power (and less expensive) version of this would also work for powering a PC case fan to aspirate your temperature probe without requiring an AC connection. Anybody bold enough to give that a try?
Cheers, Edouard