I can remember when I first thought seriously about Twitter. Last March, I was at the SXSW conference, a conclave in Austin, Tex., where technology, media and music are mashed up and re-imagined, and, not so coincidentally, where Twitter first rolled out in 2007. As someone who was oversubscribed on Facebook, overwhelmed by the computer-generated RSS feeds of news that came flying at me, and swamp
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