The Minnesota Vikings improved in Brad Childress’ second season in Minnesota and if they can improve a couple of more wins they will be in the playoffs.  The Vikings only really had three weaknesses heading into the off-season after 2007 and they were 1) a pass rush  2) a legit WR and 3) a legit QB.  The Vikings filled up the first two needs with the additions of DE Jared Allen and WR Bernard Berrian but the third one is still a big issue.  Tarvaris Jackson has the athletic talent of a Donovan McNabb who Childress coached in Philadelphia but he’s very raw.  He turns the ball over way too often and he’s not very accurate.  It will be interesting to see if Childress can coach him up and if he can’t will he have the guts to yank him in favor of Gus Frerotte during the season?  Childress’ future could hinge on this season in Minnesota as the Vikings’ ownership has opened up the wallet for him.  Childress has compiled a 14-18 record (43.8%) in his two seasons in Minnesota and nothing less than a playoff berth this season will be acceptable for the Vikings.