@sozobe,
it is good timing because the party is freaking about about a racist backlash. They really need blacks to show up to the polls, they think, because they expect some whites who say tthat they will vote for Obama to at the last minute not be able to vote for a black man. This is about providing comfort, soothing the soul of the party.
The press is all over the claim of the existence of white racists who hate obama because he is "black". I personally doubt that racism will deflate the Obama vote total by more than 1%, which is not enough to matter, but if the Obama campaign feels better with a Powell endorsement then fine. My point is that the rest of us should not give a ****, Powell does not matter.