Twitter. Twitter http://twitter.com/ association Tag. Facebook_vs_Twitter http://www.i-solutionscorppr.com/blog/?p=8 is_instance_of Social_websites. Rankings http://tweetmeme.com/ Tweets_analysis http://news.bbc.co.uk/1/hi/technology/8204842.stm       Vr.155, Dec 2010     Readme      ..