To really make it look like you weren't spamming (don't worry, I believe you) for your site, you should have included the most relevant bit:
The IntelliPoint and IntelliType drivers work with the Bluetooth desktop.
I had no idea that was the case, and it was a large part of the reason I haven't taken a close look at MS's Bluetooth sets. I finally grudgingly sprung for a Logitech S530, which looks really good next to my iMac G5, but isn't Bluetooth. It pains me to have to clog a USB port with an RF dongle when so many Macs have built-in Bluetooth.
Anyway, thanks for the tip.