narramissic writes "Back in January, a team of researchers uploaded a malicious program to Facebook to demonstrate the possible dangers of social networking applications. Called 'Photo of the Day,' the app serves up a new National Geographic photo daily, but every time it's clicked it sends a 600 K-byte HTTP request for images to a victim's Web site. Photo of the Day is still listed on Facebook, with its authorship attributed to Andreas Makridakis, one of the researchers. The application has 514 active users now, with several comments praising it. The study was published by the Foundation for Research and Technology in Heraklion, Greece, and the Institute for Infocomm Research in Singapore."