This is the first tab I've submitted.  I'm fairly sure this is the progression they play
the intro and after the choruses.  I transcribed it without the capo but you can do
3 if you're also playing the chords, just play the same frets.  Listen to the song to 
out the rhythm.

E|6-8-6-------------------------------------|
B|------6-8-6-------------------------------|
G|------------7-8-7-5-3---3-----------3-7-7-|
D|--------------------------333-3-5-3-------|
A|------------------------------------------|
E|------------------------------------------|

E|----------------------------------------6-|
B|----------6-------------------------6-8---|
G|7-5-7-7s8---8-7-5-5-5-7-5-7-8-8-8-8-------|
D|------------------------------------------|
A|------------------------------------------|
E|------------------------------------------|