Tacit,
Yep I think you are right. Publishers are very keen to keep/get control. CB would reduce their ownership so some may not be so keen. I know of four publishers that have looked at the concept but only one that has actually gone ahead with it.

Dan Marchant
Obscure Productions

Dan,

I wonder if it''s a chicken/egg thing. If more publishers used it successfully, we might see more widespread adoption. Then again, without more widespread adoption, why would they risk using it? And then there are all the other points you raised...

R.