I've heard that Janowicz grunts loudly and has a huge serve but I don't know anything else about him
Well, all I know is that he's 2,04m tall (around 6'8 if I'm not mistaken), hard courts are his favorite surface, and forehand is his best shot. He played junior finals in both US Open(in 2007) and French Open(2008). Also, he's in the polish Davis Cup team. Oh, and his nickname's JJ or Jeżyk (Jerzyk?).
(with Rui Machado, from last year's Poznan Porsche Open final)