Where Is Dick Cheney?

I was reading on some lefty blogs that were wondering where Dick Cheney has been lately. There is a rumor going around lefty blogs that Cheney and Bush have had a falling out. Then I read at NRO that Cheney was suppose to come the National Review's 50th anniversary party. They were wondering where Cheney was as well.

Now, I know Cheney got out of the hospital at the end of September after he underwent surgery to treat aneurysms behind both knees. They implanted tubes to help blood flow. Has anyone seen him since then? I am wondering if he is having complications. Wouldn't the press be on that?

Just bloggercurious.