How Google Ranks Tweets, by David Talbot, Technology Review (Jan 13)
It's mainly about reputation.
"A fundamental Google strategy for identifying tweet relevance is analogous to that used by Google's PageRank technology, which helps find relevant Web pages with traditional Web search. Under PageRank, Google judges the importance of pages containing a given search keyword in part by looking at the pages' link structure. The more pages that link to a page--and the more pages linking to the linkers--the more relevant the original page."
Posted by Gwen at January 19, 2010 02:04 PM