Oh, and if the next Doctor, after Matt Smith, is a white dude - again - it would be blatant ignorance on the part of the producers.
^This x 1000. It's not racism to cast a white guy. Just as it isn't affirmative action to cast someone who is a different race or gender. Can we just get over ourselves already and stop throwing out the racist card? They'll cast whomever they think will fit their storyline the best (or impresses them the most). Everyone is complaining before we even know who it will be. Just like they judged every other Doctor that has come before.
I hope we get someone for four seasons this time, though. It would be nice.