During editing tags I got that idea:
Would it be handy to have a tab (like collection, context and playlists, etc) where you can edit the tags of a song?

The problem would be, that the song you can edit should not has to be the same who is actually playing.

And then it would be nice too when it would be possible to query freedb or musicbrainz for information. Because by me the trm found nearly no track in the musicbrainz database. But on the homepage they are listed.