Hello, I just now downloaded again and get a zip file web2py_osx.zip, which uncompressed. I mv'd it to /Applications from ~/Downloads. When I open, I get a similar error but notice that the word Applications is now spelled Applicatoins in the error which I copied from a popup screen:
OSError: [Errno20] Not a directory:'/Applicatoins/web2py/web2py.app/Contents/Resources/lib/python2.5/site-packages.zip/gluon/contrib/rules' --