All the tabs I've seen for this intro are wrong or just seem completely senseless.  Here 
how it's played:

G---------------------8|---------10--10---|
D----------8-10-10-10--|-------8---11--11-|
A-11-11-11-------------|-9-9-9------------|
E----------------------|------------------|
                     (Note: There is a fast slide right before the last four notes in 
lick.  It starts at the 8th fret of string G and stretches quickly up two frets to the 
fret.)

Play the whole line 2 times.  Then the guitar will come in.  Continue to repeat the line 
more times.  On the fouth time, a variation happens to lead into the main body of the 
 The whole last repetition is played as follows:

Intro/Verse
G----------------------|------------------|
D----------8-10--------|------------------|
A-11-11-11-----11-10-9-|------------------|
E----------------------|------------------|

Hold the very last note (9th fret) for four beats.  From there, the bass line stays 
until the bridge. Right before the bridge happens, there's another variation:

G---------------------8|---------10-------|
D----------8-10-10-10--|-------8------11--|
A-11-11-11-------------|-9-9-9------------|
E----------------------|------------------|
So basically the variation is to hold the last two notes for half a beat longer each and 
out the doubles.

Bridge:
G-----0-----------|----------------| Repeat once.
D---1---1-----3---|--------1-1-----|
A-----------4---4-|----3-------4-4-|
E-----------------|-4----4---------|

G-----0----------|--------------|---------------------------------|
D---1---1-----3--|----1-------1-|--------------0-0-1-1-1-1-1-1-1-1|
A-----------4---4|-3---3---2---2|-1-1-1-1-4-4---------------------|
E----------------|--------------|---------------------------------|

Chorus:
G-----------|-----------|----------|-------------|----------|---------|
D------3-3--|--------1-1|-------3-3|------1-1-1-1|----------|-1-1-----|
A-----------|--1-1------|----------|-1-1---------|-4-4------|---------|
E-4-4-------|-----------|-4-4------|-------------|------4-4-|------4-4|

G------------------------------|
D----------0-0|-1-1-1-1-1-1-1-1|
A-4-4---1-1---|----------------|
E-------------|----------------|

Intro/Verse

Secondary Section
If you can't figure that out... well it's pretty easy.  We'll just leave it at that.

Secondary Verse Line:

G----------1-1|----------0-0| Repeat 4 times.
D-------3-3---|-------1-1---|
A----3-3------|1-1-4-4------|
E-4-4---------|-------------|

First part of Chorus until the end.

This is a pretty easy song... but very cool so... ENJOY!