1. Twitter
2. Obama
3. H1N1
4. Stimulus
5. Vampire
6. 2.0
7. Deficit
8. Hadron (<3)
9. Healthcare
10. Transparency
And the winners for years past:
2008: Change
2007: Hybrid
2006: Sustainable
2005: Refugee
2004: Incivility
2003: Embedded
2002: Misunderestimate
2001: GroundZero
2000: Chad
Enjoy the full article here. (Thanks Cass!)