FluTracker
http://flutracker.rhizalabs.com/
CDC H1N1 Flu
http://www.cdc.gov/h1n1flu/

More info on this govt site

One-stop access to U.S. Government H1N1, avian and pandemic flu information.

Flu.gov provides comprehensive government-wide information on pandemic influenza and avian influenza for the general public, health and emergency preparedness professionals, policy makers, government and business leaders, school systems, and local communities.

614797, Influenza Pandemics

The US Dept of Health and Human Services has an excellent Web site with information and resources related to all forms of flu, including PSAs featuring Elmo from Sesame Street, K-12 guidance for school planning, FAQs, information on H1N1 etc.

"Due to Pandemic H1N1 Influenza (formerly known as Swine Flu) and concerns about the 2009/2010 flu season, the EBSCO Publishing Medical and Nursing editors of DynaMed™, Nursing Reference Center™ (NRC) and Patient Education Reference Center™ (PERC) have made key influenza information from these resources freely available to health care providers worldwide. The editorial teams will monitor the research and update these resources continuously throughout the upcoming flu season."

Due to Pandemic H1N1 Influenza and concerns about the 2009/2010 flu season, the EBSCO Publishing Medical and Nursing editors of DynaMed™, Nursing Reference Center™ (NRC) and Patient Education Reference Center™ (PERC) have made key influenza information from these resources freely available to health care providers worldwide.

Influenza information and resources for clinicians, nurses and patients