Next to each address book entry is an icon that when selected will cause the unit to draw a map from your current location to the address given in the address book.
Anyone with something to add can enter a street address and leave a marker on the map at that location, providing a few lines of text about conditions at that spot.
Another Google-dodging feature in the new browser: Highlighting a street address on a Web page launches a map, with the default set to Microsoft's Live Maps (though you can change this default to Google Maps).