Flu.gov has put out an H1N1 timeline. It highlights, naturally, government interventions, but it’s a handy review of the progress of the virus in the U.S.
Here’s a screen shot of the beginning of the timeline:

[Flu.gov]
You can click through it month by month. It begins back in March when the virus was discovered in Mexico; it ends with a plea that everyone get vaccinated, pointing out that “community/herd immunity” will be the best defense against a third wave of swine flu.
