New Sigma DP3 Merrill with 50mm f2.8 lens (75mm equivalent)

Fashionably late but never failing to get attention (often for the wrong reasons), Sigma is back with a new DP-series Big Sensor Prime with a Foveon APS-C-ish sensor. It is the DP3 Merrill and it has 50mm f2.8 native lens (75mm equivalent).

Press Release Parade
+ dpreview
+ AP UK and Photography Blog and dpnow
+ DSLR Magazine and Fotopolis and Focus Numerique (with refresher diagram on Foveon sensor alignment)

History?
Four months ago, in the dpreview Sigma forum, one photographer pointed to a Sigma patent at Egami (computer-translated) that included a 50mm f2.8 lens. The DP3 Merrill press releases don't have detailed lens specs, so we can't tell for sure.