Things have come a long way since Roman Leibov, a literary scholar and social critic, launched the first Russian-language blog on LiveJournal in early 2001. Ten years later, cyberspace has become a powerful force in Russia for community action. In fact, blogging on LiveJournal.com has become a potent force for checking the corruption and power of the Russian state. Yesterday, this blogging community - which has faced frequent attacks recently - came under an unprecedented "sustained and powerful" attack. At 2 pm (4/5/11?), a massive attack targeted the top 5 blogs on LiveJournal, including Aleksei Navalny's blog (whose has just launched a new crowd-sourcing website called RosPil to combat state corruption). As LiveJournal administrators were responding to this attack, hackers targeted another 30 popular LiveJournal bloggers and communities. The attack - a distributed denial of service attack (DDoS) - was successful in knocking LiveJournal offline.
SOURCE
http://putinwatcher.blogspot.com/2011/04/cyber-war-on-russian-activist-bloggers.html