Here is the basic chord progression from an acoustic performance for Paste Magazine Online:
http://www.youtube.com/watch?v=YkvxsjbvM9E&feature=related
Tabbed by: Tony D.

Verse:
C - x3201x
G - x2000x
Am addG - x02213
F - xx3211
Am - x0221x
C - x3201x

Lead up to chorus:
F - xx3211
Am - x0221x
G - x2000x
C - x3201x
G - x2000x
C - x3201x
F - x33211
Am - x0221x
G - x2000x
C - x3201x
G - 3x55433

Chorus:
C - x3555x
F - 133211
C - x3555x
G - 355433

Bridge:
Bb - x1333x
F - 1x3211
G - 3x5433
C - x3555x
G - 3x5433
C - x3555x