If you have ever felt the need to search across Gmail, Google Docs and Sites, then the "Apps Search" lab announced today is exactly what you have been waiting for. The
new Labs feature makes it possible for the user to search across email, docs and Google sites from the “Search Mail” button in Gmail.
The new feature can be enabled from under the Labs tab under Gmail settings.
But Premiere and Education Edition users will have to first ensure that their domain administrator has enabled Google Labs from the Google Apps control panel. “Once the lab is enabled, the “Search Mail” button in Gmail will say 'Search Mail and Docs' instead. When you run a search in Gmail, your search results will include matching documents and sites in addition to results from your email,” Google said in a blog post.