The #! syntax alerts google's crawler that the site supports their ajax crawling scheme [1]. The fragment (part after the hash), in general, is used to denote

The #! syntax alerts google's crawler that the site supports their ajax crawling scheme [1]. The fragment (part after the hash), in general, is used to denote a specific state (or "page") in a single page ajax site. [1] http://code.google.com/web/ajaxcrawling/docs/getting-started.html http://code.google.com/web/ajaxcrawling/docs/getting-started...