Super Tour.

Neatorama Reader Lisa Poirier pointed us to Super Tour's website:

Similar to the concepts of Microsoft Virtual Earth, SuperTour.com lets you navigate you want to go. With virtual earth, you drive, but with SuperTour.com, you walk around the streets of Miami and Las Vegas, exploring the beach or some cool hotels and restaurants. The site combines the overview of Google Maps and the cool factor of Virtual Tour to create an ultimate travel guide.

Very cool indeed - right now you can only walk around Miami Beach, Florida and PIsa, Italy in panoramic goodness. Link (Thanks Lisa!)