I love Dave's gigapans. The first one I ever saw was of the Robonaut lab or something at JSC where I saw one of the engineers like 10 times. 10 times including the "1/2"s and the "1/3"s. ...
If anybody is interested take a look at this related TED:
http://www.ted.com/index.php/talks/view/id/129
Pavan
.