Wow, Compudude, you've sacrificed for the rest of us! That s80 is a sweet little camera too. Hope you were able to get another.
Yeah, good call on the plastic box Hidroj. That way nobody can bash your camera but you!
Re the paper dessicant packs, Moisture Munchers also has packs that are like little clear plastic tubes about the diameter of a skinny cigarette. Impossible to catch in a seal. And they can be rejuvenated in a toaster oven, I discovered - those little dudes are expensive!
(LOW heat for a LONG time turned out to be the key to avoid melting the plastic). (Hint for any newbies: if they're pink or lavender, they're dead. Dark blue is good.)
On my trip I just returned from, I dripped (wet hair) into my housing after one dive. The next dive, I noticed the drip rolling around right away, and kept an eye on it - didn't grow, just rolled around, I guess it must have been a drip. On our trip, out of 14 photographers (some with multiple cameras), we had 2 of the 4 P&Ss flood (reasons unknown), and one Nikon D200 (luckily the guy had 2 . . . but it was a new housing/camera setup for him). That's pretty good odds for the dSLRs.
I realized something that is good to bring with - a hair dryer and a soldering iron. We made good use of both of those on our trips. The soldering iron was used heroically to hardwire-bypass the "brains" of the d200 housing, so that the circuitry could still trigger a strobe to fire in manual mode. (Without the bypass, if you fry the housing electronics, even if you have another camera to put in there or your camera is fine, you can't fire a strobe.)