We're working on signing up, honest!
Did you know 3 watt LED MAG-LITEs are bright? and mostly waterproof to about 50'? and there's a 2 AA battery model?
We're going to try to open-source the underwater robot this year
http://www.project1726.org/nurc
we'll see how it goes! Also it's neat that you have last year's tech reports up on the
http://h2orobots.org page so other teams can get a head start.