This isn’t really that new, but I think it’s worth pointing out. Amazon’s A9 Maps have block-by-block views on many American cities. They drove a car with a camera down the streets and recorded the images on a Windows-based laptop along with GPS data.
I still like Virtual Earth, Yahoo Maps, or Google Maps better, though, mostly because of the draggable AJAX-based interface. I hate waiting for a map to refresh. Google really changed my expectations of what a map should do.
But, if you need to know what a store looks like before going there, Amazon is definitely something you should check out.