I have high hopes for this app, very slick.

I tried it last night while driving home, and it seems to spend a lot of time just spinning the map round - I'm guessing that under some circumstances it doesn't correctly calculate which direction to turn the map in to get the the GPS heading.

For the wishlist, I'd like an onscreen display of the current location coordinates, preferably configurable for different datum and coordinate system, such as OSGB.

To go with the local tile storage options already discussed, is there any easy way to convert my own raster maps into a suitable tile format? I'm sure I could hack something out if I need to, but it seems likely someone else has already solved the problem.