How to install PIL in system library using homebrew?
It seems that Pillow replaced PIL in homebrew. The new command is:
brew install Homebrew/python/pillow
Instead of installing pip and another PIL, you can just make a symlink
brew install pil
ln -s /usr/local/Cellar/pil/1.1.7/lib/python2.7/site-packages/PIL /Library/Python/2.7/site-packages/PIL
Tested on Lion, on Snow Leopard, you may need to change paths to use /python2.6 /Python/2.6.