All of a sudden today, Google analytics has started showing zero traffic for many sites. Google recently launched new features and a new makeover of their search and analytics products. Something has happened at the big G and now many users are seeing zero traffic for their site.
See the following URLs for help, or atleast to calm yourself that its not just you
http://www.google.com/support/forum/p/Google+Analytics/thread?tid=2014d04a74f04840&hl=en
http://www.google.com/support/forum/p/Google+Analytics/thread?tid=17c8772467adeb09&hl=en
http://www.google.com/support/forum/p/Google+Analytics/thread?tid=2987e7158e27858e&hl=en
Check your site status
https://www.google.com/analytics/settings/check_status_profile_handler?id=2045737
Hope Google solves this one quickly