Actually a lot of people think of 7 Nation Army as the Smoke on the Water of bass....
I remember mentioning to my girlfriend's brother that I learned that song, and he was way impressed with my skill level Granted, he's not a musician himself and has never made it to any of my gigs, but still. That one hurt
I like playing 7 nation army's "bassline" as well. Is that wrong?
Plus, the sound range of bass and guitar (specially one using an octave pedal) might overlap (see http://www.integracoustics.com/MUG/MUG/bbs/musrange.gif), so it's not a complete absurd to call that intro a "bassline". In fact it is a bassline, played on guitar.
What if it was arranged on a keyboard, or as VST, wouldn't it be called "bass line" as well?
Anyway, welcome to the forums (and instrument) BassClef 2010!
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Granted, he's not a musician himself and has never made it to any of my gigs, but still. That one hurt 
