got a software program called song genie that goes thru one's itunes and puts lyrics in for songs. if a song is mislabelled it re-labels it also if you want. amazing. its like the songs have fingerprints.
i have 71,000 songs in my itunes, so it took four days to go thru them all! i ran it nonstop the whole time i took off the last four days. it found most of them.
they also have a program called cover scout that is supposed to find the covers. its bad. super random. don't turn that thing loose on your itunes database or you will spend hours picking out the wrong cover images.