For my last trip to England I took Nokia 770 tablet. There was no time to buy London city map so I had to solve it somehow.
After installation of Maemo Mapper I downloaded some maps from Google Maps service. I have to say that MM is really good written software — quite easy to use, powerful and useful. On return trip I was in a book shop and looked at paper city map of London — it was less usable then Maemo Mapper :)
I wonder how this application works with GPS unit as this should remove a need for looking at street name plates. Maybe one day Nokia will start to sell their tablets in Poland so I will be able to test it on N810.