I wouldn't mind Jeb in 2012, although anybody in that generation of Bush's are doomed because of Dubya.
What makes you think Jeb would be better than Dubya?
Everything. He was a competent Governor for 8 years, and has always appeared more intelligent.
He also is really good with hispanics... and Florida loves him(that's a definite plus).
Being smarter does not make you a better President. Carter was smarter than Ford, but Ford was by far a better President. BTW, I read that Jeb favored big business and the rich while he was Governor. Also, Dick Cheney was very smart and was a competent Sec of Def for Bush Sr., but he turned out to be a horrible VP.