K-S2 body pricing and availablity:
"The camera body will be available at a competitive sticker price of $699/£599 while the 18-50mm lens kit will retail for $799/£699. It is expected to start shipping in April."
"The K-S2 is being marketed as the "world's smallest dust-proof, weather-resistant DSLR camera"."
For the colour haters/loves (scroll to bottom of link):
"The Pentax K-S2 will be available in a total of 10 different colors: 3 standard variants, 3 as part of a special "nature collection", and 4 as part of a special "sport collection"."
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Two versions of the 18-50mm collapsible lens, one for aftermarket, one for kit only.
HD Pentax-DA 18-50mm F4-5.6 DC WR RE
SMC Pentax-DA L 18-50mm F4-5.6 DC WR RE
The HD version includes better coatings, quick-shift focusing, (minimalist) hood vs the SMC version. Unfortunately both have plastic mounts. On the other hand both are WR (weather resistant).
158g, quite light....
MTF's in the link.