For coolness - I found a tutorial and downloadable action for photoshop that corrects pictures underwater with a red filter. (Actually, the steps are pretty complex and numerous.) The results have been applied to the pictures I took whilst in Cancun. Take a peek for yourself, they're under Tuesday Morning and Friday. Have fun comparing between the before and afters. I was amazed at how much color popped out after a bit of adjustment.
On another note I figured out why my Opera browser wasn't refreshing its visited links. There's a "delete private data" tab under the file menu that clears this up. I think it's new for the updated version.