He may not have won, the worstening economy certainly drew attention from the usual terrorism-scare-mongering that the Republicans usually use as the main theme of their campaigning. A theme where McCain, as a war 'hero' had an advantage.
Personally I think that it was a great decision by the Democrats to put a black guy up for election this time around.
It was important to get over the voter apathy of the last few elections and get people who didn't normally vote (young people, black people, minorities) out to the polling stations.
Proving you, the voter, can make a difference - and you did.
Obama is an intelligent man and just the sort that is needed at this time of economic crisis.
Well done America.