For areas that Google has Street View available, you will now see a new tab across the top of the property details pages called “Street View”. Clicking this, you’ll get a split screen map with the property marker / little man icon in hybrid view on top and the Street View panorama on bottom.
You can click the arrows within the panorama to move along streets or grab and drag to change your perspective (the little man will also update on the top map to indicate your movement). You can also pick up the little man and drop him on any blue highlighted street, allowing you to easily move around the neighborhood. The screenshot below shows a nice condo on Paradise Road in Las Vegas.
There are currently around 40 major cities where Street View is available, you can learn more about it on the Google Street View page.
Update: You can read more about this addition in the Google Street View Press Release.
Google Street View of MLS Property