Double that joy when dealing with Windows networking and/or BT. I'm not liking BT very much at all.
Perhaps Vista has something goofy with making a bridge but it worked on XP. I wanted to avoid any MAC address editing and simply rely on BT authentication and encryption.

Here's my screen chop of the bridge under XP


But as mentioned, the NIT will reboot when I first connect to PAN after being on WiFI but when it comes back up I can get on PAN via the Dell.

I don't know if this is the best way but it works. I still despise bluetooth....