The NFL has created this pretty impressive site dedicated to helping fans of teams out of the playoffs pick what other teams' bandwagon to jump on.
It's got a pretty amazing flash animation and really cool voice overs from none other than Harry Kalas. Harry will ask you a series of questions, mock you after every answer, and then determine from those answers what playoff teams' bandwagon you should jump on.
When you pick the Eagles as your favorite team Harry will even tell you to be happy because they're still in the hunt! When I answered the questions they told me to root for the Minnesota Vikings... It's a fun site.