This is a simple Xcode template for starting an Espresso Sugar (that is, a plug-in).
Installing it is easy enough. You need git installed (though you can download a tarball/zipfile from GitHub, I won't cover that here), and simply execute the following:
git clone git://github.com/elliottcable/Espresso-Sugar-Xcode-template.git \
"/Developer/Library/Xcode/Project Templates/Application Plug-in/Espresso Sugar"
After re-launching Xcode, you should see an "Espresso Sugar" in the templates.