I recently added the Truemobile 300 adapter to my 600m. The Dell drivers aren't signed and they seem to have limited BT profiles. However it has the one added benefit of being able to turn off my BT card without also turning off my 802.11g card. Fn-F2 turns off both. I'd prefer to use the bluetooth drivers that were added with Windows XP SP2. Anyone know of an add-on to enables the user to turn off JUST the BT radio without disabling 802.11 wireless as well? The Intel Proset drivers do a good job with wireless, because if you install it, you can control its radio in the taskbar. I'd like something similar.