I'd been watching PentaxForums forever in hope of a hint that a FF is on the way.
The K-5 looks FANTASTIC however I worry that I will feel I settled by not going for what I've wanted over the last several years, and that is a full frame camera.
Considering all the factors in purchasing a Nikon FF (D800 in spring), starting all over with lenses, getting squat for my K10D and half dozen lenses, the weight of a larger camera, the thought of hiking rugged terrain with $5,000+ in my hands makes me question if leaving Pentax might be a good decision.
I love my K10D. It was such a well thought out design and user interface. It still takes great pictures. (Me being the weak link in that process