Street View is integrated in the local search results and you can see Street View imagery next to each step from driving or walking directions.
I tried to install the new version, but Google Maps linked to GMM 2.2.0, an earlier version launched in June.
Update. Here are the direct links for Google Maps 2.3.1:
* Java-enabled phones: http://google.com/gmm/apps/v2.3.1/L1/gmaps-231-m2_L1.jar
* BlackBerry: http://google.com/gmm/apps/v2.3.1/L1/BlackBerry-43/gmaps-231-bb-43_L1.jar
* the native versions for Windows Mobile and Symbian haven't been updated