After adding street-level imagery for Australia, Japan, Spain, France, Italy, and New Zealand, Google's mission for the US is almost completed. "Today marks our biggest launch of Street View imagery to date: we're doubling our coverage in the United States. Several states — Maine, West Virginia, North Dakota, and South Dakota — will be getting the Street View treatment for the first time. We've also added imagery for Memphis, Charleston (SC), and Birmingham, and we've filled in lots of gaps across the country," explains Google's blog.
Many people complained that the recent Google Maps redesign made it more difficult to find places that have street-level imagery, but this should no longer be necessary, at least for the US.
Street View turned out to be fun, useful, expensive, yet profitable and a test bed for new technologies.