Thanks for all the comments guys,
fatrip; i use a little canon IXUS 400 digital with a WP-DC 800 housing. Everyone always seems to be amazed that i can get such good photos from this little beaten up pocket camera, when they can't get anything near as good from the latest and greatest. But underwater photography is almost a black art.
I'll put up the best of from my Orpheus Island trip as soon as i've got them up on photobucket, it takes a while to get 1000+ photos up!
Stay tuned people, for more exciting adventures underwater!
Ed