According to several big german newspapers Jürgen Klinsmann told German Football federation president that he won't sign a new contract.
According to sources, Klinsmann has different plans for his life, he does not want to be a long-time coach but live with his family in California and he's still pissed about all his critics who suddenly disappeared when Germany was successfull (Beckenbauer, Breitner, Meier, Hoeness).
Sad for german Football fans but he goes his own way and thinks long-term .
His successor wil likely be Joachim Löw, his assistant during the last years (actually more than an assistant, he made big part of the game tactics, but he does not have the charisma) who is expected to continue Klinsmann's philosohy. Buzt who knows, maybe German Federation begins to fight against each other again and a new coach will be installed like Christoph Daum, Sammer or Hitzfeld.
Lippi will most likely follow Klinsmann and retire in the next days, the two dominant coaches in this WC won't continue.