Rob, I found that, when I did my first dives with the S100 in Roatan, I dedicated some dives to just doing video and was able to get some good footage to put together a video or two when I got home. What's nice with the S100 is that red video button. If you happen to be doing still work and come across an interesting scene to capture on video, a quick push of the button will set you up quickly. Then, you can return to still work.
I still find that concentrating on one 'style' of photography. Be it macro, wideangle, or video on a dive works best for me as I don't have to be constantly switching settings. Of course Murphy will always send you the whale shark when you're shooting nudibranchs.
I'm also looking forward to getting Maria's book here in Ontario when it becomes available soon.
