Hi David, I did try to try using Gosmore once before, however got frustrated when I ran into problems running it. I shall however try again tomorrow.

Hi Dave, thank you for your comments.
I've like the TyTN II my friend has one and has used it successfully for both in-car and trekking navigation, he's yet to be convinced to join us on OSM.
I may well take you up on your offer to help with the spec and testing. I shall not be able to work on it at all for the next month or so though because of work commitments, but after those are out the way I should have a bit of time to concentrate on writing fun software.

Thanks, I'll try OSMTracker out tomorrow.