The maps were in beta previously and could be downloaded. They offer satellite view, public transport view, and Live traffic views. They also support pinch to zoom, routing for walking or driving, and saving of favorite locations. A pair of new features has surfaced today that are very nice and will make using the Nokia Maps more interesting for the user.
The best of the features is the new offline mode. This allows you to download the maps before you head out for a trip so you can turn off your data connection. That is a big deal if you are in an area where you are in data roaming. Other new features include POI information and new public transportation directions.