So yeah, this is the riff that's basically played most the way through:

G-------------------------------1--0------------|
D-------------------------------------3--1------|
A-1--3-3----1--3-3----1--3-3--------------------|
E-----------------------------------------------|

OR because you can hear a delay on the bass, I personally like to play the last 4 notes 
twice like this (sounds cooler :P)...
G-------------------------------1-1-0-0------------|
D---------------------------------------3-3-1-1----|
A-1--3-3----1--3-3----1--3-3-----------------------|
E--------------------------------------------------|

Then you get a key change when they start to sing "Overload, overload..."
G-------------------------------1--0------------|
D-1--3-3----1--3-3----1--3-3----------3--1------|
A-----------------------------------------------|
E-----------------------------------------------|