I was listening to this story on a PODcast (or was it ABC radio last Friday Morning?
) and it's now appeared in news @ nature:
http://www.nature.com/news/2007/0706...070618-11.html
One of the sites talked about for locating the scope on the moon was one of the poles so it could be used to take extremely long exposures in the one spot in order to look as far back in time as possible.
Al.