I too would like to have it work as a normal GPS with out having to put in a destination.
As far as I know there is no way to get the 3D street view to follow you on the screen as you're traveling. If you've ever gone in to street view and tried to move your view down the street by clicking the arrow buttons... it takes a few seconds to load the next view. The problem is that there isn't anyway for Google maps to download/refresh quick enough to keep up as you're cruising along at 30-70mph.
BTW - if you select MENU, MORE, LABS and and check the My Location Button it will place a blue button on your map screen. All you have to do is "press" the blue button above the zoom icon and the map will travel with you as you drive. Another setting in that menu is Compass Arrow and if you check that option then you will have a little arrow pointing in your direction of travel.