I may be wrong but I think that properly tagged music is quite important for this application and the developers' ambitions for it. If you don't feel like retagging your music (or just downloading properly tagged versions of it) then don't, but you really can't expect the developers to change their plans to suit your preferred method of remembering what your music's called.

And as for Shoutcast integration - surely there are dedicated internet radio apps more suited to that.

Audiobooks? This is a music app that is intended to detect your mood and play you things to suit that mood - do you expect it to pick up that you fancy hearing a chapter of Martin Amis followed shortly afterwards by some Steinbeck?

Lyrics? Really? You want your N900 to be a karaoke machine too?

I think this piece of software is coming along nicely and I hope that people give it the chance to develop and not demand that it be something they think they want.