Just watched him on Nightline
Impressions:
He is too slick and too pat.
He 'knows' Rove did it.
He dodged the fact that he has been politically active against Bush for sometime prior to the alleged outing of his wife.
He is on a mission, and his wife plays only a peripherial part in it.
As far as a great scandal: One person getting outed, with the President on the record for full cooperation, is not much grist for the mill.
I hope the left grinds on this long and hard. There is not much nutrition in it.
Ed