Google Sites now supports access from mobile devices. You can access your sites list and get content from your site optimized for the small screen experience. This new functionality gives LBL users a platform to quickly deliver mobile optimized content.
By going to General settings under More actions > Manage site and clicking on Automatically adjust site for mobile phones, your Google site will be automatically adjusted whenever it’s viewed from an iOS or Android 2.2+ device:
More information is available from the Google Blog