I found a pretty nice software to bring order to your Mp3-Collection (using the ID3 tags). Maybe somebody except me has fun with: "Tagrunner"

Ive already tried it and can say it is a very substantial program. It finds all the missing information of your songs, like title, name, cover, songtexts, etc.

You can download it on nearly every known download-page and also under www.tagrunner.com