This may be useful to somebody.
You need a Series 60 phone (e.g. the Nokia 6630 or 6680) and a bluetooth GPS receiver. I'm not sure if it's required but a memory card might help.
This software was designed for visually impaired users. It talks. I'm not sure what the visuals are like but seen as it's free, it might be worth a try.
Does anyone here use TomTom or another GPS system, as a matter of interest??
The free GPS software can be downloaded here: http://www.loadstone-gps.com/download/