Yes I am very interested in 2G.... but
I bought into the 1G system when the Yen was favourably low more than a year ago (compared to my currency anyway)
This was my first UW camera, but I have tried out a couple of friends' compacts as well. I was sure I wanted a WA lens, i thought RAW sounded like a good Idea and a YS110 flash could be fun as I got if for "free" when buying the camera directly in Japan instead of here.
As it turns out,
1. I've never taken the WA lens off once on, and would never by another compact without that capability. (Why I would not consider the G10 which seems to be a really nice camera otherwise (I am normally a Canon follower))
2. I found the RAW possibilities much more useful than i thought I would, so I only use RAW now.
3. Proper Flash was a pleasant surprise and very fun to use and very useful.
Because of the RAW speed, 2G seems to be the camera I would have liked to buy last year. Now with 1G I have to be patient and accept loosing opportunities. The 1G's flash integration with YS110 is not good (although i seem to have got around the problem and get almost 100% hit rate now). This would also be a reason to step up to G2. Finally a bigger screen would have been excellent to be able to really see flaws while reviewing the results under water.
So there are compelling reasons to change. If the 1G housing would have fitted, I would have bought the GX200 on an instant. But now, having to change both housing and camera and given that I wont get much from my 1G set-up, I will patiently gather more experience and save up to an entry level SLR with a fish eye set-up instead.
Cheers