What catches on in the Twitterverse?

From http://www.nytimes.com/2011/02/06/business/06stream.html?_r=2

It turns out that the way information spreads online is often more complicated than viral transmission, in which one person passes a link to, say, a YouTube video directly to another person. As with political topics, people often wait until a number of friends or trusted sources have promoted an idea before promulgating it themselves.... A smaller, more connected network might be more likely to respond to a recommendation from one of its own valued members, says Jure Leskovec, an assistant professor of computer science at Stanford..... 

An earlier Stanford study found that bloggers, over time, had more influence than mainstream publications in areas like technology or entertainment.

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