The Live Maps team just released an update last week, adding 21 new 3D cities and over one hundred new "bird's eye" cities for the Live Maps service. The list includes cities both in the United States and in Europe. Check out the blog post for the complete list and see if your city or hometown was included. If you're in a large metro area, though, there's a good chance that Live Maps already has imagery for your area.
Also included in the update was new aerial imagery. All maps for North America have been republished with the latest NavteQ street data, new JD Barnes aerial imagery has been added for Canada, and lots of new aerial imagery has been added for both India and China.