Just like in the days after Sarah Palin was picked for VP, there's a lot of speculation about this "Joe the Plumber" character. I think some of the speculation has been verified- the fact that he's got a tax lien, and he's not licensed as a plumber. But I've seen a lot of speculation about his possible ties to Robert Wurzelbacher, the son-on-law of Charles Keating of the Keating 5 scandal.
Move on. Nothing is there.
Robert M. Wurzelbacher, son-in-law of Keating, was 37 years old in 1991 when federal charges were filed against Keating. It appears that he has addresses in Phoenix and Coronado, CA.
The Robert M. Wurzelbacher of Milford, OH, a heavy donor to GOP candidates, is 83 years old and retired. They're not the same person.
Digging to see if this guy is a plant or a hypocrite is a good idea. But I think it's equally important to know the link before idle speculation.