My other favorite band is The Police, who used a "333" graphic on the Ghost in the Machine cover, one of my all time favorite albums.

AND to connect back to U2, this album includes "Invisible Sun," which Bono has sung with The Police on at least two occasions--one at Gateshead in around 1982 and again at the Amnesty International benefit concert on June 16, 1986 at Giants Stadium (my first U2 concert, and until 2007, my last Police concert).
http://www.youtube.com/watch?v=EvGpWksgEI8 Another connection: both Andy Summers and Stewart Copeland attended the Rose Bowl concert.