Just throwing out a question:
Is there any mapping application that has (or plans to have) support for storing maps on the microSD card in my 8800? My TomTom, which I use for navigation in my car, stores all the maps of the Eastern US on a fairly small card, so I know this should be possible with the right software. It would be enormously useful to be able to use my GPS in areas where there is satellite but not cell tower coverage, and to have the maps load more quickly than they can using the mobile network.