I think that the World Wide Telescope is a great product, much better than google earth. There are a number of reasons, but I believe the major one was the level of collaboration and the true scientific nature of the product. Overall, there needs to be a way to delay the tours, or have them load in the background. Background loading is a technology used by some web based television services that are integrated with microsoft media center. My point is that you should be able to download a number of