Politico's swing state map

Check out Politico.com's interactive map of the swing states in the race for the presidency.

It labels each state as solidly for one candidate, leaning, or one candidate leading, based on Real Clear Politics polling.

Each of the swing states where one candidate is currently leading has a short summary of historical trends and how the candidates are vying for the state.

It's a pretty useful tool, presented in a straightforward interface. My only criticism would be that the distinction between "leaning" and "leading" is never explained.