http://www.v3.co.uk/v3-uk/news/2108654/researchers-firesheep-snag-google-search-history
Researchers have modified the Firesheep web attack tool to track user activity by way of Google search cookies.
Vincent Toubiana and Vincent Verdot, from Alcatel-Lucent Bell Labs, published a report entitled Show me your cookie (PDF) demonstrating a process in which Firesheep could harvest search cookies and use the intercepted data to view a user's click history and contact information.
Show Me Your Cookie And I Will Tell You Who You Are see the pdf