This site, as many do, has spawned an idea. Use or create a lyric database, and write a program that will allow a user to select any number of bands or CD’s to compare or analyze.
You could do some cool things with this kind of functionality. You could pit Metallica against James Taylor, Puff Daddy against Hootie and the Blowfish. You could get indivual band info, for instance, it would be cool to figure out what Radiohead’s most used word was, or how many times NWA uses the F bomb.