Jason LaCanfora of NFL.com has put out a piece with the most up-to-the-minute salary cap figures for each NFL team and, not surprisingly, the Minnesota Vikings are near the top of the list in available cap space.
According to LaCanfora, the Vikings have a "team cap" of approximately $122.7 million, and have about $108.1 million allocated for this season, leaving them with right around $14.5 million in salary cap space.
Going down the list, the teams that I can see with more available salary cap space than the Vikings are the Cincinnati Bengals, Cleveland Browns, Jacksonville Jaguars, Kansas City Chiefs, Seattle Seahawks, Tampa Bay Buccaneers, and Tennessee Titans. I may have missed one or two in there somewhere.
With the pickings getting a little slim on the free agent market at this point, the Vikings might be wise to turn towards some of the guys currently on the roster that could use a contract extension. Percy Harvin and Jared Allen would be the two most obvious candidates for such a move. They might be able to grab a few guys here and there, but there probably won't be any serious movement in Minnesota, personnel-wise, until the draft.