Great job, especially since the camera was new to you. I bought the A720IS about two weeks before my trip to St. Croix, US Virgin Islands in December. Took 700 pictures and 30 minutes of video, used only the internal flash and flash diffuser, but my pictures didn't turn out quite as nice as yours. I switched back and forth between macro and normal, but a storm (subtropical storm Olga) was passing through and the water clarity wasn't the greatest.
I used manual mode with underwater white balance, and didn't bother with adjusting flash intensity or center-weighted vs. spot focus. The video was nice, especially when I combined clips to make one video out of them, but then my Windows Movie Maker became unstable and locked up because I loaded it up too much by trying to put music, still shots and video clips into one long video.
I really like this camera and it takes great pictures. For my next dive vacation, I will make sure to learn how to use more of the functions. I'd like my pictures to be as bright and crisp as yours. I've been taking underwater pictures for almost 14 years, but just got in to digital photography in December.
Anyone have any ideas about free movie maker software that can be downloaded? RickG, did you use a flash diffuser?
Thanks!