[cd34]

The application itself uses xMB, the data can be pulled from storage as needed. I would suspect the actual running application is a fraction of the 256mb downloaded. But again, with the droid, it comes with the google turn by turn which can download a route and has spoken instructions. Google also has provided an API to allow other applications to customize that app and add features, so, even though the application has the capability to store routes on phone, the actual application is only using 1.1mb when running.