Not sure if its the right key or not, done by ear, it's close enough for me.
[ Tab from: http://www.guitaretab.com/s/slash/206112.html ]
Main riff
1/2
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|-------3b-----------------------|
A|-0h3h4---5-4p3p0-3-5------------|
E|--------------------------------|
A variation
1/2
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|-------3b-----------------------|
A|-0h3h4---5-4p3p0-2-1------------|
E|--------------------------------|
Another variation
1/2
E|--------------------------------|
B|--------------------------------|
G|--------------------------------|
D|-------5b-----------------------|
A|-0h3h4---5-4p3p0-3-5------------|
E|--------------------------------|
this is all i've figured out, hope its good, and if not, hope it gives you a basis
on which to figure it out yourself on.
Thanks.