I switched from a Nikon film to a Nikon Digital so that I could use my old lenses. After making my purchase I found out that digital-ready lenses record what you see through the lens. The lenses designed for film cameras, while working on a new digital body, don’t capture the entire image in the viewfinder due to the shape of the CCD (or something along those lines – think it was a image info mapping issue). You might want to check if that is the case with Pentax as well, and then decide if it is worth the hassle of having to figure out which part of the picture the camera will record for each lens. It is fine for portraits where you have a great deal of control over image composition and compliant subjects, not so fine for action or hard to replicate shots where you may only have a brief window to compose and click.
Further laughs: when I purchased the new digital a year and a half ago, I asked how much they would give me on a trade-in on my 2-yr old F65. They said it could be as much as $50! Hard to believe that a camera worth hundreds of $$$ 2 years prior could only have been worth $50. It has now been added to the old camera collection.