The W90 is Pentax's solid successor to the W80. It's got a new strap and LEDs around the lens for close illumination. It's also slightly more resistant, rated to 20 feet of water and 4-foot drops.
The new case is nicer than the old, and the innards seem pretty similar to the older model (which I liked). There's the 12mp sensor, 720p video recording and digital shake reduction as well as a 5x 28-140mm equivalent lens. I liked the old one, so I'll probably like the new one. (Although perhaps not quite as much as I like the new rugged Lumix TS2.) [Pentax]