NFL.com just put up an article about the remaining cap figures for each team.
http://www.nfl.com/news/story/0ap1000000154634/article/remaining-salary-cap-space-for-each-nfl-team
According to this we have $7,271,911 left which is less than most but enough I would say to sign a player or three (DHB anyone), while this is okay for now I do worry about 2014 as the cap is to remain flattish and with Suh's huge cap CJ's contract and of course Stafford's hopefully new contract I am really concered about next year season cap more than this one.
Sorry for putting the downer on this free agency buzz but I think everyone should at least keep half a thought for 2014.