Finally an underwater housing for the GH1 and GF1!

It looks like a manufacturer called http://www.10bar.com/ has released underwater housings for both the Panasonic GH1 and GF1.  It appears they are located in Hong Kong, so I am not sure how you would buy one.  Possible dealers in the USA.  The housings are rated to 300' deep and allow for full control.  I am assuming the GH2 would work as well.

http://www.10bar.com/new_home.htm