"would like to pick up a lightweight waterproof camera one of these days (they seem to be getting smaller and lighter w/ each year)"
Me, too. Check out the Sony Cyber shot DSC-TX20, new for this year, or even the TX10, which is last year's model and can be found cheaper as they draw down their inventory. Panasonic has one that is supposed to be slightly better, but I can't remember its model number off the top of my head. The Sony is under 5 oz, battery included. the Panasonic is slightly heavier.