Is USM already here?

[Boris Liberman]

Hi!

Adorama and probably others have for sale some Sigma lenses for Pentax 
mount that feature HSM - high speed motor. Is it a mistake? Or is it 
indeed USM lenses that can be used on Pentax cameras?

I mean not to start a flame or something of this sort - I just want to 
have my confusion resolved.

Thanks.

Boris