これは便利http://yamashita.dyndns.org/blog/iphone-google-calendar-nuevasync/

sudo gem update --systemと打つと以下のエラーが発生。 /opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- sources (LoadError) from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems…