A team of us are working on porting gnat to mac os x.  we are making
slow progress.  we are getting a lot of questions from people to our
individual mail so we have set up a mailing lists thru the kind help of
Mike Feldman of GWU.  Apple computer is also providing a pointer to the
public list for those who want to be kept informed of status.  we will
try to keep status reports to a low volume.   but you can ask questions
volunteer help etc here by posting as well.

you can join through apples web site:
http://www.lists.apple.com/cgi-bin/mwf/board_show.pl?id=3&pg=2

best jim