This is just plain cool.
It's also a great example of stats being skewed via self-selection. Take a look at how Obama "polls" via Twitter users - it's a LANDSLIDE!! I don't know how much better Electoral-vote.com and Hubdub.com work around the self-selection bias but at least it looks a bit more reasonable.
In addition, it's a great lesson in the oddities of the electoral college system. Obama and McCain could be a dead-heat percentage wise but as long as Obama carries the big states he's can walk away with it...hence the ever present discussion of battleground states.