(Click to Enlarge! The Look is Super Clear! Picture(s') Source: pentax.ru)
This is no more a rumour, it is real! The lens is announced:
http://pentax.ru/press/articlehtml/pr_ffa100wr
(in Russian)
http://www.dpreview.com/news/0912/09120903pentax100mm.asp
Let's wait for the Pentax Full Frame body to come, together with a new Full Frame lens lineup (and the dismissal/fall of the DA line)! Well, we shall have a Full Frame system "soon", my bet!
On the other hand, at the same time, the old DFA 100 Macro is discontinued:-
http://www.pentax.jp/japan/imaging/digital/lens/index35_others.html
(in Japanese)
After all, once again, when I judged things to be real, they are real! ;-)
Real Also:- I Did It Again! Ricoh GXR "Rumour": Bingo! :-D