You can take that great Gsus4 chord that Guy mentioned above and while leaving your pinky and ring finger in the same place just move your middle finger up to C (5th string 3rd fret) and your index up to E (4th string 2nd fret) and you have a nice I-IV-V when you throw in that D chord reminicent of Wasn't Born to Follow by the Byrds. Have fun,vl