Yea, Dells and monitors are no-no.
The thing is, there are programs that hook in to these monitoring programs. I think the two most common ones are Motehrboard Monitor, but that has been discontinued, and Speedfan http://www.almico.com/speedfan.php.If anyone figured out how to hook into these programs and reviece the CPU temp numbers then we could get something interesting.
Perhaps, if someoen appreached the author of Speedfan suggesting that he made some API for his program, when I bet we'd pretty soon get plenty of front-end GUI's popping up.