There are a few tabs out for this, but none in the open D6 tuning 
that M Ward plays in, so here's my take on it. I'm just doing the 
chords, you can have fun figuring out the fingerpicking yourself!

In Open D6 tuning (DADF#BE)

D=054530 or 004030
A=002320
A7=002120
G=555585 (or 555555 for the more colorful G6)
G6=020100
Gm6=010100 - this one may not be 100% right

Verse 1:
       DThis (xx0232@1)river that we ride has always been alive
                                       A (x02220@1)       DOh (xx0232@1)my soul one hundred million years
       DThis (xx0232@1)river that we ride will roll on when we die
                                      A (x02220@1)       DOh (xx0232@1)my soul one hundred million years

Chorus:
         G (320003@1)                 DAnd (xx0232@1)this love, this light, between you and I
    G6 (320000@1)                 Gm6 (3x5353@1)               A7Is (x02020@1)older than that burning ball of fire up in the sky
                                        DAnd (xx0232@1)the gale that fills our sail

Verse:
              D (xx0232@1)                         
And the lights that shine tonight have always been alive
                                       A (x02220@1)        DOh (xx0232@1)my soul one hundred million years
               D (xx0232@1)                  
Yeah the lights that shine tonight will burn on when we die
                                       A (x02220@1)        DOh (xx0232@1)my soul one hundred million years

Chorus x2:
              G (320003@1)                       DAnd (xx0232@1)this love, this light, between you and I
    G6 (320000@1)                 Gm6 (3x5353@1)               A7Is (x02020@1)older than that burning ball of fire up in the sky
                                         DAnd (xx0232@1)the gale that fills our sail

END