Saw this and thought some here might enjoy....
From the NewScientist report on it:
http://www.newscientist.com/blog/space/
"The site features a map of more than half a billion astronomical objects. You can navigate around it easily by clicking and dragging the map and using a zoom-in/zoom-out sidebar. You can also search on specific objects by name from a database........."
The website:
http://www.wikisky.org/
Cheers
Brian