Have you downloaded Microsoft's WorldWide Telescope (WWT)? If not, you can find it here, free of charge.
Once you kick the tires, be sure to join our community. WWT communities provide tours, images, and other information relating to the night (and day) sky to members. So far, our community features tours covering galaxies, orbiting observatories, our impending (meaning long after you're gone) merger with Andromeda, and naked-eye open star clusters. We've also published a few of our most popular booklets as PDFs on WWT.
After you download WWT, you can join our community here.
Post any comments you have about your experiences with WWT below. Did it blow you away? Did it disappoint you? What do you think is the potential of this tool?