Researchers from Hewlett-Packard's Social Computing Lab in Palo Alto, Calif. have developed a new ranking system that measures a tweeter's influence -- how often his or her followers click on a posted link and then repost, or "retweet", it to their own followers. The goal is to figure out which voices on the social networking site not only stand out from the crowd, but spread ideas throughout that crowd.

1. @mashable, a social media blog

2. @jokoanwar, film director Joko Anwar
3. @google, google news
4. @aplusk, actor Ashton Kutcher
5. @syfy, SyFy Channel
6. @smashingmag, a web design magazine
7. @michellemalkin, conservative commentator Michelle Malkin
8. @theonion, satirical news organization The Onion
9. @rww, tech blogger Richard MacManus
10. @breakingnews, a news aggregator

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