Nike's first NFL product has been unveiled; "Vapor Jet" gloves. When a player crosses his hands just so, the pattern combines to form his team's logo. Very popular among players who like to mug for the cameras.
This concept isn't exactly new; Nike has produced these for their college programs for the last few years:
Today Nike posted photos to its Facebook page with a Packers version and one for each of the League's 32 teams under the heading "Pro Bowl 2012".
The meaningless Pro Bowl is one thing, but I don't think we should expect to see these in an actual game; they seem tailor-made for a 15-yard Unsportsmanlike Conduct flag. The NFL isn't too keen on the use of props in celebrations.
UPDATED 1/30/2012: Greg Jennings wore these gloves in the Pro Bowl, and made the first hand-shout in NFL game history, albeit the exhibition game.