According to Barack Obama's website, his name is spelled Barack:

http://www.obamaforillinois.com/index.asp?Type=NONE&SEC={8683FB66-C0DB-4FAB-85C7-2FBCF770436E}

And I think I agree with michaelr on this one. Let's see how what his voting record looks like after he gets elected, if he does get elected.