After much consideration and contemplating I am the new owner of a canon G9; as opposed to the new owner of a housing for my Canon 30D DSLR. While I'm sure I would enjoy the advantages of a DSLR set-up I am very impressed with the G9.
One of the deciding factors for me was that I recently returned from Kona I found the baggage of of dive gear; my DSLR for land shots, my SP-350/ike housing, and Canon SD 550 for on the go land shots to be a bit of a burden and quite the load.
I thought I was going to go the DSLR route, but that wasn't going to really lighten my load. I often like to mix non-dive activities on my 'dive trips' and sometimes I just don't feel like lugging the DSLR/tripod/large zoom lense package, so I also need to carry a compact.
I picked out the G9 because I like the operation/control package and the very usable RAW capability and the hotshoe makes ikelite wired ttl possible. What I am also looking forward to is carrying the G9 as my only camera on 'dive trips'; perhaps a back-up compact like the SD850 IS will be onboard as well, but the G9 really lightens my load.
For those who haven't checked it out; see the G9 review on dpreview.com
This camera can shoot RAW files at about 1 fps until the card is full! My SP-350 would take about 6 seconds before I could take another shot. Also, the 3" LCD is very nice.
Battery life should get me through two dives+ as the ike ttl set-up doesn't require use of the onboard flash.
Overall very pleased with this camera topside and will provide a more in-depth review after getting it wet!
Now I can get by with one carry-on and my large akona roller bag...