kirkengaard, I have an MSI board. I did a little looking around and you appear correct in that not all the boards have the thermel sensor chip. I read two reviews that mentioned that the MSI board doesn't have a way to monitor the temperature. So it appears that its up to the board maker.
I'm also running Slackware 10, but with the 2.4.26 kernel plus a self applied I2C patch. Was hoping to get sensors and rivatv working together, but I finally read that the 6106 drivers dont work w/ that. I couldn't get the 5336 ones working consistently either, but thats another story :P At least lm_sensors works though
Thanks for the reply.