Grega: I've seen the shield vendor website, but I'm much more interested in hearing from folks who don't have a direct financial interest. :.
I could certainly do a watchdog, but would really prefer not to depend on on it. Especially since my friend is telling me that he may want to add a "shut down the equipment on over-temperature" feature: I wouldn't want an I/O pin glitch due to flakey software resetting the temperature monitor to needlessly reset the other equipment. It's supposed to help avoid hiccups, not add them.