Music: Mad Men Theme

So, I didn't watch Mad Men until getting ready for my part as Don Draper in Bar & Grill: Double Feature.  I'm working late in my office, and I just hear the Mad Men theme song coming out of my desk speakers.  It turns out that the show's theme music is from a song called "A Beautiful Mine" by RJD2 (which I downloaded along with some other songs recommended by iTunes).  I'm sure I've heard this song many times before, but I didn't make the connection as I wasn't a fan of Mad Men until a few weeks ago.