I just saw the link to this at a conference. It wasn't demonstrated, but I liked the name...Mapwing. Seems easy to use, like Powerpoint® combined with Google Maps. Here's what they say about themselves:
"Mapwing makes it easy to build, share, and explore virtual tours. Use Mapwing to turn your digital photos into virtual tours that include interactive maps, images, and comments. Then, share your virtual tours with friends, clients, or the entire world. Begin creating your own virtual tours for Free - Just Sign Up or Learn More."