[Encode/Transcode selected WAV/MP3 files to MP3 using LAME - #3 by BenjaminW)
id3cp would copy every ID3 Tag from any file format I think (you can even copy the ID3 Tag to an empty file which is like a backup 
). But I don't know wether ogg/flac use these. I have compiled id3cp from the id3lib package. It was a simple example in it.
Greetings
Ben