How in Cthulhu's name does this not mention that Warren Buffett's father was a Congressman, Howard Buffett of Nebraska (http://en.wikipedia.org/wiki/Howard_Buffett)? Probably, I think, because it would sound bad. It sounds modest to say "I didn't get here entirely by my own efforts; I was lucky to have been born in the US, instead of Bangladesh." It doesn't sound modest to say "I didn't get here entirely by my own efforts; my father was a Congressman who had a strong personal friendship with Murray Rothbard, one of the most famous economists in history."
"How in Cthulhu's name does this not mention that Warren Buffett's father was a Congressman, Howard Buffett of Nebraska"
Because he's trying to make a general statement about estate tax in the United States, so talks about the general condition of being born in the US. If he talked about his specific childhood, it wouldn't have the same generality. I doubt it has to do with modesty.
He owns lots of maturity-mismatched assets. He hasn't done much with gold. He's bought into lots of highly regulated companies. And he advocates punitively high income taxes on some activities, and high income taxes on most other activities.
So no, I don't think Buffett is a Rothbardian. He's similar only in the sense that he understands economics very well.