PMA was uninspiring this go-round, with little for backpackers to get excited about. That said, there's been a little movement on the wide-angle front. I've compiled a list, which isn't complete but hits the major makers. Note: NONE of these upcoming models has RAW format or a viewfinder, which really, really limits them for shooting outdoors on sunny days (but, what backpacker wants sun every day? ;-)
Some have active image stabilization, which is a Very Big Deal for hand-holding in low light or when your pulse is racing and the camera weighs a scant few ounces.
Canon--nothin' Come on guys, you're the market leader!
Sony--DSC W120/130, 32-128
Sony's not exactly setting the world on fire with their Zeiss collaboration.
DMC FX35, 25-100
That's more like it.
Pany gets it, but is allergic to viewfinders. Why, guys?
Water, shock and bearproof--has obvious appeal to hikers who don't baby their gear.
Fuji 100fd, 28-140
Fuji has a near-cult status following for their chip and lens performance.
Casio Ex-Z200/100 28-112
Sigma again showed the DP1 and is threatening a spring ('08) release. *If* it lives, and lives up to its promise, it will be the most important backpacking digicam ever. They also tantalized with this new lens. Feel free to place a deposit at your nearest dealer.