The Washington Post online has a good list of resources:

http://www.washingtonpost.com/wp-srv/health/swineflu/index.html
The Resources are live links to the following very informative sites:

World Health Organization
Pandemicflu.gov
Pan American Health Organization
Centers for Disease Control: Swine Flu and You
Centers for Disease Control: Interim Guidance for Patients
National Institutes of Health: Timeline of Flu Pandemics
On Leadership: How to Calm a Panicked Public