I emailed Tamron US about availability and price on what all hope is up to their 28-75 performance and here was there reply .
We do not sell from here, only distribute through dealer where you would have to purchase the lens. I think the Pentax mount will not be available until early next year here in the US which I think is the same for Canada.
Reading between the the lines
"I think" - usually indicates no idea ...
"Early next year" - might mean January/February 2008 or as we have seen it may mean November 28th, 2008 at 08:00 am
So the future still looks bright - albiet the lack of availability for fast tele-zooms lens is quite frustrating for some of us.
Well want what you have and keep on shooting ...