Okay, here are some handson experience w/ the camera so far:
1. It IS tiny! Yeah, just like some said above, you have to see it to feel how small it is.
2. The built quality is top notch. You won't be able to find another camera in similar size and built quality. It might not be a Leica, but I think Pentax really put a lot effort in making this thing.
3. It's small, but it feels very good in hand. Some might claim the camera is too small for a big hand. But for such a tiny camera, you don't need your whole hand to hold it. Just a couple of fingers will do.
4. It's very easy to operate, easier than you'd think for such a small camera. If you've used Pentax camera before, you probably don't even need to ready the manual. It's just like you are using a Pentax dSLR camera
5. AF is really fast for a small camera like this, I feel it's faster than my GF1+20/1.7 combo (which is considered to be pretty fast for an EVIL camera)
6. Focusing is spot on most time, even under complicate light condition
7. Photos produced by the camera and the kit lens is really really sharp, even wide open.
8. If shoot in RAW, the dynamic range is pretty good, pretty usable at ISO800 if you get the exposure right. If picture is under exposed, you still can push up the dark area, but definitely need some noise reduction work
9. White balance is pretty accurate, results look very natural even under very complicate light.
10. It is indeed a very fun camera to have and play with.