This lens seems to have become Pentax's 'Duke Nukem Forever'. I just hope it doesn't languish in limbo as long as that game has ('in development' since 1997!).
I was looking at some of the earlier pictures when it was first announced, and then comparing them to the pictures of the latest 'mockups,' and I've noticed a difference in the diameter- the original (
here increases in diameter right above the zoom ring and again right before the focus ring, while the latest
here shows it remaining fairly constant (along with the obvious changes to the height of the focus and zoom rings and the addition of the tripod collar). Now, if the first was based purely on the idea of the 60-250 and not on any actual design, this difference means jack diddley. If however they built it on the actual design of the 60-250, this difference belies changes internally- most likely a change in optical design, it seems to me. Personally, I liked the 'look' of the old lens better.
I think I'm spending too much time and energy on this....