Standard tuning, but it's a little high. (Just listen to the song and tune your guitar accordingly)

----3-------3-------4-------4-------3-------3-------3-------3---|
--4---4---4---4---4---4---4---4---4---4---4---4---3---3---3---3-|
5-------5-------5-------5-------3-------3-------4-------4-------|
------------------------------------------------0-------3---5---|
3-----------5-------------------1-----------2-------------------|
----------------4-----------------------------------------------|

And that's pretty much the whole song. Try to play it without looking below, but if you
need a cheat sheet, here it is...

For the first chord, start out with a bar chord and use your pinky to hit A-5 for the
first transition.
3
4
5
3
3
x

On the second chord, just bar your index finger across the 4th fret on all strings, and
keep your ring finger on G-5.
4
4
5
4
4
4

Third chord is like so: use your index finger to go from A-1 to A-2 for transition.
3 -ring finger
4 -pinky
3 -middle
x
1 -index finger
x

And for the final chord: use your index to bar the 3rd fret on both high E and B.
3 -index finger
3 -index finger
4 -ring finger
0 - (use your middle finger to hit D-3, then your pinky to hit D-5)
x -
x -

Enjoy. Hope the tab was helpful.

-Rags