Aquí están las últimas encuestas de Gallup:
http://www.gallup.com/poll/election2008.aspx

Y las cotizaciones de los betting markets:

Iowa electronic market
2008 U.S. Presidential Vote Share Market
2008 U.S. Presidential Winner Takes All Market
2008 U.S. Democratic Convention Winner Takes All Market
2008 U.S. Republican Convention Winner Takes All Market

Intrade:
Democratic to win Dem convention
Obama to win presidency