OK so I don't even on an android phone yet. However I was demo'ing a DroidX the other day and was blown away by the google map and voice ability. This will lead me to buying one of the android devices. Among other features. Query: Can GPS enabled apps, work on the phone, without cell serivce. IE can you pre-load say all the US map and POI info into the phone so it can be used as a standalone GPS in the middle of no where. Like on a Motorbike ride or a hiking trip?