This is most relevant to my interests. Now all I need is one of those table-sized smart PCs so i can have fancy schmancy maps, then when its battle time ... ZOOOOOOOOOOM! .. oh look, 1inch grids.

:-)

On a more serious note, if you download Google Earth, you might be able to tell it to use your own world, and thus use your maps offline. I'm guessing. It follows logically in my mind though.