Does Ricoh have a lot more resources than Hoya (the previous owner)?
Ricoh is a big photocopier company with a small line in compact cameras. Hoya, apparently, wanted the medical/optical expertise of Pentax, and have kept that bit.
Ricoh are supposed to want the Pentax camera business for its interchangeable lens know-how and designs. I can't think why. Ricoh has its own GXR interchangeable lensor (lens+appropriate sensor, in a unit) technology, which makes eminent sense if you want to develop a compact system camera. They also have a long track record of making the best-handling compact cameras, and have nothing to learn from Pentax (or anybody else) in that department.
Why Ricoh would want to make DSLRs I cannot imagine - they don't sell cameras in America, where those behemoths are still popular.