Chicago Sears Tower Link
Today Google Maps will add six new areas covered by Street View. The total number of cities will then be 15. The new cities added today will be Phoenix, Tucson, Chicago, Philadelphia, Pittsburgh and Portland, Ore.
The images in Phoenix, Tucson and parts of Chicago are all in high resolution like in San Francisco and San Diego.
Google have also introduced the ability to pan up in most new cities so you can watch the skyscrapers.
Google Maps Street View is also available in Denver, Houston, Los Angeles, Las Vegas, Miami and Orlando. (Source: Google LatLong)
They have also created a new song and video on YouTube announcing the 6 new cities: