By the Numbers
The Great and Powerful Kos has a couple of nice maps showing SUSA's 50 state polling data. Even given that some of the data is old, it's still worth noting that McCain loses to either Clinton or Obama. I'm not sure I necessarily buy that Obama could put North Dakota into play, or that Clinton would lose Washington, Oregon and Michigan, but still it's an interesting view from eight months out.
UPDATE: A more nuanced view of the SUSA numbers. As much as I'd like to believe it, I still have a hard time seeing either Obama or Clinton getting within a point of McCain in Texas. As a matter of fact, Texas is a pretty good canary in the coalmine for the GOP; if come summer polls consistently show the Democratic nominee within striking distance here, then it's going to be a blue tsunami.