I can't believe no one has posted this already. This is just the little riff that the 
keeps repeating.
One of my first tabs; for the rest of it the rythm alternates between C9 and G*.

E------10-7----------10-7-|---------10------------------------|
B---12------10--7-10------|---10-12----12-10-h12-10-13-12-10--|
G-12----------------------|12---------------------------------|
D-------------------------|-----------------------------------|
A-------------------------|-----------------------------------|
E-------------------------|-----------------------------------|

*THIS IS NOT 100% CORRECT and might be played in regular tuning soemwhere else on the 
But it's a beautiful song anyways...

Slacker