Is America about to undergo its biggest ever change?

This is an Irishman with an interest in US Politics asking this. After Iowa it was a good start for Barack Obama(especially seeing as Edwards campaigned very heavily there), the voters came out in bad weather and he seems to be attracting a high % of 18-30yr old female votes as well as the more obvious modern America vote. Come Super(Duper) Tuesday in 4 weeks will America be in a position to vote for it's first African-American leader, surely it would be a Godsend and bring positivity around the world. This may sound silly but if Obama was white he'd be perfect without attracting the ethnic vote! What do you think, and why? Educate me!