PLEASE NOTE THE SIMPLECV REPO HAS MOVED (as of 4/17/13):
http://github.com/sightmachine/simplecv
To update your existing repo please do the following:
cd SimpleCV
git remote rm origin
git remote add origin https://github.com/sightmachine/SimpleCV.git
Or you can just delete your existing directory and reclone:
git clone https://github.com/sightmachine/SimpleCV.git
WARNING: The REPO here is for legacy purposes only, all new code development can be found at: http://github.com/sightmachine/simplecv