For some reason I thought they had this already, but seems that Google Earth now has the moon in it as well. You can get more information from the website linked above or the @googleearth twitter feed. The cool things are proper 3D models (taken no doubt from the soundstage where they were first used) of the landers, interactive views like the panoramic views you can "fly" into a-la earth on google earth, and other nifty things. Check out the video on the splash page, or grab the version 5.0 to check it all out. If you already have Google Earth 5.0, just go to the planet dropdown and select 'moon' and voila, there you go.