I found some info on PBS about Google and Google Earth:
The rest of the universe got a little closer to your classroom this week when Google announced the addition of high-resolution space images to its Google Earth tool. And if the real universe isn’t good enough for you, there’s even a wiki galaxy you can edit to create your own solar system. Combine these ideas with virtual worlds like Second Life, and the educational possibilities are endless.
I’m just finishing up a funding proposal that would use google earth, and one problem we had was the lack of resolution required, and we were planning to suppliment things with higher quality images ourselves. Perhaps now we won’t have to! The article also mentions Galaxiki a wikiesque galaxy creation tool. Neeet.