# if you're bothering with a hostfile block, you probably want these
    fbcdn.com www.fbcdn.com fbcdn.net www.fbcdn.net
    www.static.ak.fbcdn.net static.ak.fbcdn.net
    facebook.com www.facebook.com connect.facebook.com
    login.facebook.com www.login.facebook.com
    www.static.ak.connect.facebook.com static.ak.connect.facebook.com
    www.static.ak.facebook.com static.ak.facebook.com 

    # might want to add these as well
    google-analytics.com www.google-analytics.com ssl.google-analytics.com

hear hear!! i second this.