i was dreading the process of going through my large mp3 selection and finding album covers for all the different albums, so i was over joyed when i found this little app. and whats more its FREE!!
http://louhi.kempele.fi/~skyostil/projects/albumart/i would advise getting V 1.3.1 as V1.40 gave me some trouble, but feel free to try it out for your self.