Nope - didn't watch. Well I did watch the 30 seconds when the winner was announced. Other than that - no way. I heard some of it as Thing2 and the wife watched the whole season.
Ann Althouse is a fan. And Right Thoughts has a great comment about last night:
Sanjaya Malakar is sharing a stage with Smokey Robinson, and lo, the fourth seal did appear and open before them and a plague was released on the earth.
More here. (Rated R for language)