The NY Times Interactive team has put together an interactive visualization displaying the spread of the swine flu virus. The applet is a static map with interactive markers showing the amount of confirmed cases. The Guardian has created a similar application but their version shows the spread in relation to the past dates which helps to understand correlations and directions of the spreading.
The data set
The Guardian Data Store keeps the data stored in a public spreadsheet on Google Docs making it available to everybody. If you need geo data on the entries to map the data, you can use the extended feed we’ve created with longitude and latitude to all the entries.