Come to think of it, there was a rumour ("from people familiar with the matter") about a 35mm Pentax DSLR before the K-01 was announced, could they just leave the current line-up as it is and have the flagship camera go full frame?
Harriet, you would be one to know, do the Ltd primes work on a 35mm camera or are they APS-C only?
Tamron 90mm SP Di Macro
Tamron Adaptall 2 - 28mm, 28-80mm, 500mm Mirror
Pentax KAF - 18-55mm WR, 28-105mm PowerZoom
Pentax K - 50mm f/2, 50mm f/1.7, 28mm f/2.2