Panoramas.dk (which is a pretty amazing site, btw) has 360˚ QTVR panoramas of the Apollo 11, 12, and 17 missions to the moon, with sound clips and everything. Very neat!
Nova Online has more QTVR Apollo panoramas, along with still images.
Virtual Reality Moon Phase Pictures will show you an updated picture of the current phase of the moon, and you can also select any date and time from 1800-2199 to see how the moon looked or will look then. Nice toy.
The Full Moon Atlas is a nicely detailed interactive map of the moon. Smooth interface with lots of features and information.
I came across a couple of non-moon space links that I thought were worth sharing, too. An Atlas of the Universe is a great set of maps, each on a larger scale than the last, showing the universe from the solar system up through the solar neighborhood, the Milky Way, the local group, and all the way to the visible universe. (The image below is of the Virgo Supercluster.)
Finally, here is an intriguing scale map of the solar system, with one pixel for every 1000 km. Fortunately there are direct links to each of the planets, because except for the sun and Pluto at either ends, it's essentially impossible to locate anything else in the middle of all that nothing. It's a nice way of putting things in perspective.
For many more fascinating space links -- and the source of many of the ones posted here -- visit grow-a-brain's Space Archives.