One of the reasons that the Minnesota Vikings were so terrible in 2011 was just a blandness to their football, a lack of star power past guys like Jared Allen. On the offensive side of the ball in particular, the Vikings were just not all that exciting to watch; the Vikings offense only managed to score over 30 points three times the entire season. Christian Ponder's wide receiving corps are decent and they have a possible future star TE in Kyle Rudolph, but there's no real shining stars except maybe Percy Harvin.
Randy Moss is coming back to the NFL reportedly, but it's doubtful that he's going to want a third stint in Minnesota. There is a plenty intriguing candidate in the WR group for free agents this season that the Vikings may want to take a look at, Indianapolis Colts star Reggie Wayne.
Wayne is a savvy veteran who plays the game well every time he steps onto a field, Peyton Manning at the helm throwing him the ball or not. The Vikings could certainly use a guy who has over 10,000 receiving yards and over 70 touchdowns in his career, a guy who could give Christian Ponder a sure target no matter what the game situation. The Colts look very likely to break up the band as it were after such an abysmal year so there's a pretty good chance that Wayne will be available as well.
There have been rumors of Reggie heading to a team like the New England Patriots, but it certainly couldn't hurt an offensively stalled team like the Vikings to dust him off and take a look.