Tomtom 6.010 (7640) for mobiles.
Yes 3rd edition symbian O/S for n80, n91 etc has been out for a short while. Had it working on my n80 for over a week. Uses same maps,voices, postcode files as PDA version.
Hope u have got good eye sight.
Added--
Just read somwhere that the n91 is one only two 3rd edition phones that will not work at the moment with tomtom v6.