git clone git://github.com/tlrobinson/narwhal.git narwhal
cd narwhal/platforms
git clone git://github.com/tlrobinson/narwhal-jsc.git jsc
cd jsc
make jscocoa
cd ../..
NARWHAL_PLATFORM=jsc bin/narwhal
o = NSObject.alloc.init
o.description
Better examples forthcoming.