I tried Tomtom v6 on my HD2 and it failed to work. Contacted Tomtom to find out the upgrade options to v7 and was told that I would have to buy the full product!
I have used the Telmap Nav but it's a bit too small to read, which I suspect is that they have not updated it for the HD2.
So.. my next step is to find a good sat nav for my HD2 - at a reasonable costs! Bonus if it's free.
Can anyone recommend one? What do you use?