I also hope that Pentax will release a camera based on the size of the K10D. The K7 is just a bit too small for my hands, it feels cramped in my hand. And no, I'm not overweight
I don't need the size of a D300 (although it fits my hand nicely without battery grip, but the K10D w/grip is best).
Body size was ultimately my deciding buying factor. If Pentax keeps the smaller size then I'd seriously consider switching. Kind of a dilemma for Pentax finding the right size, isn't it?
So I'm holding of lens purchases until the next DSLR body is announced and see what the size is going to be.
Oh, just for the record, sensorwise I'm fine with APS-C, just wishing for more DR. Photographed a wedding together with a friend who's got a Fuji S5 Pro. I pulled a lot more details out of the RAW files of the bride's bright white dress using the same exposure settings. That was nice!