Well, they don't "float" to 0V, but yes, they are grounded by default... and leave them that way - they set the address of the DS1721 on the I2C bus... and Mark (Lord) wrote the support for that ID on the bus.

Sorry I haven't been watching the list so closely... I've been swamped at work (another 13 day.. yay)...

Nice pics, Loren, I know I need to update mine... in fact, I'm gonna do that now...

One of these days when I have a minute, I'm going to rip out my old fan controller and put in a new one...

Thanks to everyone else for helping those with questions...

-Ben