This is not my tab, but I feel it lays out this song better than any others on this site.
Here is the youtube video of guy who wrote the tabs and played the song.
http://www.youtube.com/user/Eusebio92#p/u/11/lw4zb_j1wMM


Intro:
AmF
---------------------------------------------------------------1-----------|
---1---1---1---1---1---1---1---1---1---1---1---1---1---1---1---0-----------|
-2---2---2---2---2---2---2---2---2---2---2---2---2---2-------2-------------|
-2------------------------------------3------------------------------------|
---------------------------------------------------------------------------|
---------------------------------------------------------------------------|
C E
-0-------0--------0-------0--------0-------0--------0-------0-------------|
-----1-------1--------1-------1--------0--------0-------0--------0--------|
---0---0---0---0---0---0---0---0---1---1---1---1---1---1---1---1----------|
--------------------------------------------------------------------------|
-3-----------------------------------2------------------------------------|
--------------------------------------------------------------------------|
Am F
----------------------------------------------------------------1----------|
---1---1---1---1---1---1---1---1---1---1---1---1---1---1---1---0-----------|
-2---2---2---2---2---2---2---2---2---2---2---2---2---2-------2-------------|
-2-----------------------------------3-------------------------------------|
-0-----------------------------------3-------------------------------------|
---------------------------------------------------------------------------|
C E
-0-------0--------0-------0--------0-------0--------0-------0-------------|
-----1-------1--------1-------1--------0--------0-------0--------0--------|
---0---0---0---0---0---0---0---0---1---1---1---1---1---1---1---1----------|
--------------------------------------------------------------------------|
-3-------3--------3-------3--------2-------2--------2-------2-------------|
--------------------------------------------------------------------------|
Main Part:
F C
-1-------1-------1--------1--------0-------0--------0-------0-----------|
-----1-------1--------1--------1-------1--------1-------1--------1------|
---2---2---2---2---2---2---2---2---0---0---0---0---0---0---0---0--------|
-----3-------3--------3--------3-------2--------2-------2--------2------|
-------------------------------------3-------3--------3-------3---------|
-1-------1-------1--------1---------------------------------------------|
E Am
-0--------0-------0-------0--------0-------0--------0-------0-------------|
------0-------0-------0--------0-------1--------1-------1--------1--------|
---1---1---1---1---1---1---1---1---2---2---2---2---2---2---2---2----------|
------2-------2-------2--------2-------2--------2-------2--------2--------|
-2--------2-------2-------2--------0-------0--------0-------0-------------|
--------------------------------------------------------------------------|
Repeat Main Part once, but for the Am part do:
Am
---------------------------------------|
-1------------------------------1------|
----2---2---2---2---2---2---2---2------|
------2---2---2--------2-------2-------|
-0-----------------0--------0----------|
---------------------------------------|
Then Play (same chords):
F C
---------------------------------------------------------------------------|
-1-------------------------------------------------------------------------|
---------------------------------2---0------------------------------0------|
---3---3---3---3---3---3---3---3----2---2---2---2---2---2---2---2----------|
-----3---3---3--------3--------3---3---3---3---3---3---3---3---3-----------|
-1----------------1--------1-----------------------------------------------|
E Am
--------------------------------------------------------------------------|
--------------------------------------------------------------------------|
-1------------------------------1---2------------------------------2------|
---2---2---2---2---2---2---2---2---2---2---2---2---2---2---2---2----------|
-2---2---2---2-------2--------2---0---0---0---0---0---0---0---0-----------|
-------------------0-------0----------------------------------------------|
F C
--------------------------------------------------------------------------|
-------------------1------------1---------------------1-------------------|
-2-------------------------2--------0-------------------------0-----------|
---3---3---3---3---3---3---3---3---2---2---2---2---2---2---2---2----------|
-----3---3---3--------3-------3---3---3---3---3---3---3---3---3-----------|
-1----------------1-------1-----------------------------------------------|
Bridge:
E
----------------------------0---------|
-------------------0------------0-----|
-1-------1----------1---1---1---1-----|
---2---2---2---2------2---------------|
-2---2-------2------------------------|
--------------------------------------|
Play Main Part twice but for the second time, for the Am part do:
Am
-0-------0--------0-------0----------| x4
-----1--------1-------1--------1-----|
---2---2---2---2---2---2---2---2-----|
-------------------------------------|
-0-----------------------------------|
-------------------------------------|
Then Play:
Am C
-0-------0--------0-------0--------0-----------|
-----1--------1-------1--------1-------1-------|
---2---2---2---2---2---2---2---0---0---0-------| Connected to next part
-----2--------2-------2--------2-------2-------| (couldn’t fit it all on one
-0-------0--------0-------0--------3-----------| line in the Blog)
-----------------------------------------------|
F E
-1--------0--------0-------0--------0-----------| x4
------2--------0-------0--------0-------0-------|
----2---0---1---1---1---1---1---1---1---1-------|
------3--------2-------2--------2--------2------|
-----------2--------2-------2--------2----------|
-1----------------------------------------------|

Ending:
Play the main parts twice again, except gradually slow down on the second E Chord and 
play this instead of the regular Am picking:
Am
----------------------|
----------------------|
-2--------------------|
----------------------|
-0--------------------|
----------------------|