I have just purchased a nokia 6600 and after spending over 2 hours trawling the net (no pun intended) am even more confused about its GPS capabilities.

will any bluetooth (whatever that means) GPS reciever work

Are you sure you're not getting confused with GPRS, a completely unrelated technology that the 6600 supports?

GPS = Global Positioning System
GPRS = General Packet Radio Service

GPRS basically amounts to low speed (but faster than WAP) internet access on mobile devices.

It is unfortunate that GPS and GPRS sound so similar in acronym form, and it is more of a shame that the mobile phone shops pander to it. Well, either that or they don't listen. Too often you hear:

Customer: "I want a phone that can do GPS"
Shop-bloke: "Certainly. Any of the current mid-range phones supportit"
Customer: "Oh great " (to self/partner/etc "it cheaper than Macro")

You can do it.
You need a Bluetooth GPS unit and compatible software.
(Bluetooth is the wireless technology that sends signals from the GPS Unit to the 6600)

Software has to be suitable for the 6600 and the GPS Unit has to be suitable for the software.

You may already have seen this example. (http://pocketgpsworld.com/wayfinder-nokia-gps.php)

Originally posted by cgksheff
You may already have seen this example. (http://pocketgpsworld.com/wayfinder-nokia-gps.php)

That looks pretty cool. It'd be interesting to see how reliable it is with the bluetooth link.