He hasn't announced it yet- He's Biden his time...
It won't be a woman, he will go with a more "traditional" candidate (Whatever the heck that means in this election)... I think Biden is a strong possibility, but worries me- Biden has a bad habit of putting his foot in his mouth in spectacular ways...
However, I think Biden's demonstrated 'family values' show up McCain for the slimeball he is...
Richardson would also be a smart choice in my opinion... he has stronger foreign policy credentials than McCain.
We will know soon...