When Sigma saw the Tamron started shipping, they said "we better do something".
Sigma News - 70-200mm F2.8 EX DG Macro HSM II for Four-Thirds and Pentax available next week
hehe... I had to laugh. This upcoming week
is "next week" too. Hoping they're smarter than to commit like that and not deliver.
As a side, I think B&H doesn't have a good relationship with Sigma any more. They don't have it listed for any mount (searched on Sigma "70-200mm") but 47 St. Photo does.. taking orders @ $809. They're the guys that gave me my 300mm @ a killer price. tempting tempting.
Yeb, the DPReview test says:
This lens uses Sigma's 'HyperSonic Motor' (HSM) variant of ultrasonic focusing for fast, accurate and near-silent operation. The good news is that this will be provided for users of all lens mounts, but unfortunately it also means that users of older Pentax DSLRs which don't support SDM lenses will lose out, and only be able to focus manually (in other words, the lens is effectively of KAF-3 mount specification).
I found it quite interesting that the reviewer chose to write that addressing Pentax directly, where the body the test was being done on was a Nikon, so why bother mentioning Pentax at all. Well, very kewl not to be ignored...
Anyway, that's still a "yes" for you.