Wait, you mean they don't run the company using their "SharePoint killer" Google Sites?... See the full article for more details.
There are screen shots of e-mails dubbed "Product Snippets," in which engineers tell each other about their weekly activities. The e-mails are then compiled into a searchable database. There's a "Google Ideas" application where Googlers can read about what other people are working on and offer comments and ratings.
Another important tool is Google's intranet search engine, "Moma," which lets employees search for everything from available conference rooms and lunch recommendations to the employee handbook and time cards. The application is integrated with Gmail, Google Talk, Calendar and Docs.