We really need to set an age limit on how old people can get while staying in office before being forced to retire. We already prevent people younger than 40 from running for President. Why should we let people older than 65 do it? What's the difference?
John McCain is a good man, I think he has good intentions, and is very qualified for certain positions. This is just not one of them, and it isn't because I disagree with him (I do), it is because he isn't qualified to make decisions about computer science or technology.