EDIT: new transit - visible from SF :)
How about this for something different? Want to see the International Space Station cross the face of the moon? You'll need a long lens - something like 300mm on a crop sensor, or something like ~500mm on a full-frame - but you're more than welcome to look through my camera.
What will it look like?
Something like this: http://www.flickr.com/photos/50847591@N00/6697737727/in/p...
...and yes, you can just make out the details of the station: http://tinypic.com/view.php?pic=55l1c4&s=5