As I wrote previously in this blog, it's a heel-toe weighted Anser-style blade, that features a series of red ribs on the face. The ribs are designed to help to reduce skidding on the greens and get the ball rolling faster.
I've seen five different versions of the Nike prototype putters and each was heel-shafted; I did not see a high-MOI Nike prototype putter with the red ribs in the face.
Here are the clubs that Lucas Glover used to win the 2009 U.S. Open at Bethpage Black:
DRIVER: Nike SQ Sumo2 Tour (9.5°) with Matrix Apache Ozik shaft
FAIRWAY WOODS: Nike SQ II (13°, 19°)
IRONS: Nike CCI Forged (3-PW)
WEDGES: Nike SV Tour (52°, 60°)
PUTTER: Nike prototype
BALL: Nike ONE Tour D
(Photo by Al Tielemans/SI)