I'm guessing that the intro guitar riff is Johnny Marr,
 their new addition. Sounds
good in my opinion. The riff is pretty catchy, and 
there's some fluff in there too. The
has a lot more going on so I can't tell what the guitar
 is doing, id it's doing anything
By ear, here's what I think is going on. Enjoy!

Standard Tuning (e-a-d-g-b-e):

Intro

e-9----7-------7--9----5----3-------3------------------
b-7----7----7--7--7----3----3----3--3----5/7----5------
g-7----7----7--7--7----4----4----4--4----4/6----6----6-
d----------------------------------------5/7----7----7-
a------------------------------------------------------
e------------------------------------------------------

e|-5-------------------| 
b|-5----5--7----5------| 
g|-6----6--6----6------| 
d|-7----7--7----7------| 
a|---------------------| 
e|---------------------| 


e----5-------------------7--9---------------| 
b----5------8----7----7--7--7---------------| 
g----6------7----7----7--7--7----(etc...)---| 
d-7--7------9----9--------------------------| 
a-------------------------------------------| 
e-------------------------------------------| 


Riff

e-----------------------------------------------| 
b-----------------------------------------------| 
g-9--9--9-9-9--7--6----9----9--9--9-9-9--7-6----| 
d-----------------------------------------------| 
a-----------------------------------------------| 
e-----------------------------------------------| 


Pre-Chorus

e----------------------------------------------------| 
b----------------------------------------------------| 
g-4--4--4--/11-11--9------4--4--4--/11--11--9--------| 
d-4--4--4--/11-11--9------4--4--4--/11--11--9--------| 
a-2--2--2---/9--9--7------2--2--2---/9---9--7--------| 
e----------------------------------------------------| 

And comments and/or suggestions can go to *