Who is possibly behind Facebook Downtime?
At the begining of November the famous group of hackers named "Anonymous" declared their intend to bring Facebook down as a part in their war with Zynga.com the famous facebook partner, this may be one possible cause, a war that all involved are badly harmed!
[ALT="Facebook Down"]http://s12.postimage.org/snkgw50h9/136293838_1.jpg[/ALT]