Use social media to help manage your projects

In a recent article at Untitled1, they look at ways social media can enhance your project management tool set. You can use blogs for project status updates, wikis to help centralize your information, and for larger projects, you can set up online communities. These tools shouldn't replace what you already have, they should enhance the tools you're already using.

Do you use any of these tools when you are managing a project? What benefits have you seen?