It seems like he does a lot of one-offs with other artists lately. "Game of Love" with Michelle Branch springs to mind.
Yep, Supernatural was a smash, so I guess that's the safe direction for his career. Then again, the dude has earned the right to do what he wants.
I listened to their Christmas cd a ton over the past month. Pick it up now for next year!
http://www.amazon.com/Christmas-Spirit-Los-Lonely-Boys/dp/B001EYGOGA/ref=sr_1_6?ie=UTF8&s=music&qid=1262106992&sr=8-6