Volker Weber just blogged about thee things you can do to protect your privacy on facebook
1. Edit your Facebook Privacy Settings and uncheck "Instant Personalization"
2. Disable everything on this page to prevent others and applications from accessing and sharing your information
3. Volker also recommends blocking the following three applications: Microsoft Docs.com, Pandora and Yelp
Now, if I could just get rid of Farmville and Mafia wars forever.....
Source: Volker Weber