i've been wanting this for a long time too (and i think its come up before). i like using my OCD data for tagging, CD playback and the like, but i've had to use an elaborate workaround using foobar2000 and a (defunct) FreeDB proxy. And now that method's beginning to fall apart (again). Using OrangeCD Player for scrobbling would mean i could ditch foobar2000, and i could maintain play data at both last.fm and Racks & Tags simultaneously.