Got the BTW doohickey for the camera and the GPS data-logger yesterday. Haven't done much testing apart from acquiring a GPS signal, which relatively quick, but I didn't time how long. And I plugged in the BT adapter to the D300. Turn on he camera after the GPS has been turned on and poof, you have GPS data. Browsing the GPS info in the menu shows the coords with interval updates and the current time, pulled from the GPS via bluetooth.

I have to go for a short car trip on Saturday, so I'll try to bring the camera with me and take some snaps. I'll also turn on the logging feature so I can test the tracks against snapped photos with our P&S camera as well.