Wow! I wonder if I can get a housing for something like this:
http://www.flickr.com/photos/fotoopa_hs/se...57611107153997/
Which reminds me.. Back in the old days of the Nikon D70 there was a undisclosed trick where you could lock the focus at a specific spot and press down the shutter button. The camera would not take the shot until the subject crossed your preselected focus path. Is this functionality still around on some of the newer Nikons?