Have a look through some of the recent threads here and also in the Sticky (link in my signature) as there is a ton of information on current model options.
Sony isn't really a leader when it comes to compact cameras for underwater use - Fuji, Canon, Olympus and Nikon tend to have more and better options.
Canon A720, A590 or G9 or G10 (some models discontinued but you can find some of them pretty easily).
Olympus SW series ... I personally am not impressed and the more I see the less impressed I am, but some others really like them and you should consider these cameras as an option if you are 100% positive you do not want manual controls.
Olympus 350 ... again, discontinued but if you can find one, it's a good system. Even the old Oly 5050 if you can find one will serve you well, though be warned it's slow. But I still miss mine - it was just an awesome camera, really, despite its foibles.
Fuji F30 if you can find one, F50 is newer and still around.
So many more, but at least it should get you started on your shopping spree!
