There are only two progressions in this great song by powderfinger.  
I'm pretty sure that the tuning is correct, thanks to Woody :)  
Enjoy! 
 
Tunung: GGDGBE (low to high) 
 
VERSE RIFF: 
E-|----3------3------3--------3--|- 
B-|----3------3------3--------3--|- 
G-|----0------0------0--------0--|- 
D-|------------------------------|- 
G-|--0------3------2------3/5----|- 
G-|--0---------------------------|- 
 
SECOND GUITAR RIFF: 
E-|-3-----------3-|- 
B-|-3h5p3p0-----3-|- 
G-|----------0----|- 
D-|---------------|- 
G-|---------------|- 
G-|---------------|- 
 
CHORUS RIFF: 
E-|---0h1--------1------------------|- 
B-|--------------1------6--6p5----5-|- 
G-|-2--------0h2--------5--5------5-|- 
D-|--------3---------5--7--7p5-5--5-|- 
G-|------------------5---------5--5-|- 
G-|------------------5---------5----|- 
 
That's basically it, just play around with it and improv a little 
with the chorus riff.