Dpreview posted their Sigma MC-11 adapter hands-on video:
Sigma is the first brand of DSLR lenses to support Eye AF and Lock-On AF modes on Sony cameras, as well as smooth phase-detection in video. What’s more, they work really well.
Sigma’s new MC-11 adapter cost $249 and will ship in April according to BHphoto (preorder here).
P.S.: New Sigma 30mm E-mount preorder links at BHphoto, Adorama, WexUK, Amazon.de, Calumet Germany.