My main question is exactly what PSI rating the seals have. There needs to be a ballpark value or the sealing is meaningless. Right now it is hope the exposure is not too much for them to handle.
As for salt water exposure. I have no issue with salt water exposure on my K20D. I used to do a lot of salt water fishing for fun. Reels make the cost of a camera body look like peanuts. Rods are even more expensive. Even the best metals and alloy's or even ceramics will eventually corrode from salt water exposure. The key to it is a good rinsing in fresh water as soon as possible, ideally w/o allowing the water to dry on the body before rinsing. Using a gentle stream from a faucet should present zero problem for the seals as long as one takes care to not blast the water flow into the seals. The idea is just to get the salt and other minerals off the body and portion of the seals which are exposed.
When it comes to cleaning gear fishing or camera, the sooner after exposure the better. Actually the same goes for river, lake or whatever water. I like to carry or keep gallon bottles of distilled water for a final rinse after the tap water and even soft water can be corrosive to rubber seals so that final rinse can only help.
My other concern with respect to the sealing is a really basic one...what is the lifespan before they begin to break down. What are the seals made of? That will help the consumer know what is reasonable to expect. I certainly hope they are not simply some form of rubber. Then again I have no idea what the current level of these things might be...
To me the sealing is in the top two reasons for switching to Pentax...along with in body SR. So the more details Pentax offers the happier a user I will be...
The cynic in my says that a reason they will not disclose these things are to keep people buying new lenses over used...right now a lot of competition comes from 20-30yr old lenses they made themselves. I see people who take a lot of shots out in the elements selling they lenses fairly often just to be safe.