A lot of Underworld fansites have disappeared into the dustbin of Internet history, but with the help and permission of the original owners, I've brought a couple of the more useful ones back.
bigscreensatellite - Ex-numberonesuperfan Matt's site has probably the most comprehensive discography of Underworld releases through 2005 or so. There's also a lot of additional misc. and JBO info.
Deep Blue Morocco - Doug Stewart's original Underworld lyrics site.
I don't plan on making any changes or updates to these, but they're valuable archives for the information they have.