Don't ask why I was browsing GeorgeWBush.com but I did. I'm neither fan nor hater.
Compare it to Howard Deans, which has some nice features, but is not nearly as good as George W's.
My guess is that this really matters. It still doesn't matter as much as speeches on national television or scapegoating tv adverts but I'm sure having a informative website will shift the voting results in numbers of millions.
As a professional web developer I'm glade to see that the effort is being made. It must be said that the logo could need some work. In fact, there seems to be two different logos. Is one just for the website?