Xcode4 dropped PPC support, so when I try building PIL, it throws hate:
Bens-MacBook-Air:Imaging-1.1.7 bkeating$ python setup.py build running buildrunning b
Just to help others... I had to use ARCHFLAGS="-arch x86_64" before building imaging with my Snow Leopard/XCode 4 system i.e. having "-arch i386" in their stopped it working for me.