The following article was just posted over at CNET News regarding the massive DD0S (Distributed Denial of Service) that targeted Twitter, Facebook, LiveJournal and more.
Via CNET News:
A pro-Georgian blogger with accounts on Twitter, Facebook, LiveJournal and Google’s Blogger and YouTube was targeted in a denial of service attack that led to the site-wide outage at Twitter and problems at the other sites on Thursday, according to a Facebook executive.