A tip for this song, just in case anyone decided to take the plunge:
In order to get the percussive tap/flick motion going, do not rest your palm on the guitar while playing. In this way, you force yourself to naturally come down harder on the strings as you do the motion. This has caused me to unlearn, for the moment, the economy of motion I have been striving for. That said, tapping out a beat while playing a bass line and melody is very cool!