On the contrary, the more Obama talks, the more people realize he:
1. Isn't saying a damn thing.
2. Is a socialist.
Are you serious?
So far, every additional hour of exposure has catapulted him to more votes. You will notice that his winning streak is vastly increasing, and his poll numbers are going up every month.
Maybe you really want for this to be the case, but the facts do not support this view.
If the superdelegates don't select Hillary, it is extremely likely at this point that Obama will win the 2008 election. McCain is simply not that good at politics-he couldn't beat George Bush in 2000. He is hated by his party's core supporters. And if there is an antonym to charisma, it will be the word used to describe him when he stands next to the democratic nominee in the debates.
A continuation of the "conservative" winning streak of the 90's is fantasy at this point. GW has done too much damage to the movement, and it would take someone with the charisma and organizational skills of...Obama....to put up a realistic fight on the republican side.
Or hillary on the dem side, but that doesn't look like it's going to happen anyway.