A visitor to my site signed my guestbook the other day with a link to his creation - a globe that you can spin to your desired location. It's fun to play with but I found the earth being turned upside down quite easily, and then not being able to figure out how to return it to the angle I wanted it at.
A few months back I was experimenting with NASA's World Wind software, which does a similar job but also pulls in data from satellite imagery and other aerial photo sources whilst also allowing you to zoom to a much greater detail. When it is all working properly you can zoom in and even look at mountains and other terrain in 3-dimensions thanks to the SRTM height data collection on recent shuttle missions.
(I still had the same problem of disorientation in NASA's software too!)