Noticed no one had this tab so I tabbed it for you! Hope you appreciate it..
Any in put email me at: SupraSlick15_14@Juno.com
Props go to: Gabe 

John Mayer 
Somethings Missing
p -Pull Off
^ -Strum Up
( )-Optional
h -Hammer On
This is the tuning for it:
high e=e (dont change)
B=B (dont change) 
G=F# (2nd fret on the newly tuned E string)
D=E (The 5th fret on the newly tuned B string) 
A=B (The 7th fret on low E)
low E=E (dont change)

Intro
e-----0^-------------------------------0-------------
B-----0^-------------------------------0-------------
F#----0^----0---0----0---0-------------0-------------
E-----0^---0---0----0---0---2p0--------0-------------
B-----2^--2---4-----------------4p0-2--2-------------
E-----------------2----4-----------------------------
Play intro 4 times 


Verse

e----0----------0----------0---------------------
B----0----------0----------0----------0---0------
F#---2--(0h2)---9--(0h9)---5--(0)-----0---0------
E----0--(0)-----0--(0)-----5--(5)-----0---0------
B----2--(2)-----9--(9)-----x--(x)-----4--(0h4)---
E---------------0----------5--(5)-----4--(4)-----

Chorus

e--------------------------------------------- 
B---12-----------------12---------------------
F#--12-----------------12--------------------- 
E---12-11--------------12-11------------------ 
B----9----12-9----------9----12-9------------- 
E----0------------------9--------------------- 
Play each part twice..

Thats pretty much the whole song, hope you like it, took tons of work!