Port Blue - The Gentle Descent chords

Artist: Port Blue (Adam Young's awesome side project!)
Album: The Airship
Song: The Gentle Descent

This is an easy song to play, and it uses these very basic chords in standard tuning:
[ Tab from: http://www.guitaretab.com/p/port-blue/365388.html ]
     G   D   A   Em
|e---3---2---0---0---|
|B---3---3---2---0---|
|G---0---2---2---0---|
|D---0---0---2---2---|
|A---2---x---0---2---|
|E---3---x---x---0---|

Here's the entire chord progression:

G D x8
D A Em D x2

Hope this tab helps.