The preproduction n900 loan model comes with a 'working' copy that has navigation. Driving and walking options. Though the driving option is the assumption, the default.

With wifi on it comes close to finding your location in under 30 seconds. It seemed to think it knew where I was as soon as it loaded.

I say close as presently it 'thinks' I'm either in the Institute of Education or off Endsleigh Street...mainly opting for the former. I'm a block over though on Malet Street though.

The ovi maps on the n900 doesn't seem to recognise pedestrian routes though. (Telling me it would take 6 minutes to get to where I am, and stating it's version Ovi Maps 1.00. And yes there seems to be no voice directions like in version 3 that I installed on my e71 (with subscription) until my 3 phone decided I didn't want to go back to the bar with the costumed bar tenders and deleted the installation!)

It would be interesting to see if there is an alternative and more relaible server to the Nokia aGPS one set as default.