I'm holding my wife's K2000 in my hand right now. Gee, it's small, but I want it smaller...
- use a proprietary lithium ion battery that takes up half the space of the current 4 AAs. That'll remove the handgrip.
- make it next generation Live View, in other words, usable. That'll remove the Pentamirror and associated hump.
- slim the rest of it down by 10% through improved miniaturization
Make those changes and voila, a K-mount EVIL camera to challenge the Olympus E-P1 and the new Panasonic GF1! It won't be quite as small, but small enough.
Pick up some of the styling cues from the classic Pentax 35mm cameras and the new K-7 and you'll have grown men wetting their pants in anticipation.
Sell the body only for $350, and you'd have hordes of current Pentax owners shelling out the dough for a second body.
Me, I'd slap my DA 21 Limited on that thing faster than you can say supercalafragalisticexpealadocious!