Sometimes one can see a clear trend and then it's valuable. I think people some times over-estimate the speed of trends. There is no way for instance that a generic Northeastern Democrat takes Virginia, North Carolina or Arizona in the next election. The key battlegrounds remain the same: Florida, Pennsylvania and Ohio. After that comes Wisconsin, Iowa, Colorado, Nevada and New Mexico. I don't expect the candidates to make any effort at any other states for various reasons.
So that leaves the Dem candidate with the Kerry states minus PA and WI=221 EVs and the Rep candidate with the Bush states minus FL, OH, IA, CO, NV and NM=213 EVs.
Why is everyone ignoring Michigan? I think it is in the key battleground group. It was a 51-48 state. And Bush didn't even show up with his best stuff here.