I strongly disagree about YADB being anywhere near as comprehensive as CDDB. I work in radio and receive a lot of promo releases of new music which manages to get into our hands a few weeks before they hit the streets and I consistently find many, if not most of those releases already in CDDB's databases.
I have never encountered a situation where YADB had a result and CDDB did not.
Additionally, CDDB does at least some rudimentary verification of submitted information while it's evident YADB does not. I have encountered bucketloads of obvious grammar errors in YADB results that just don't occur with CDDB (neither is 100% perfect though).
I have also encountered the growing trend of individuals who want to show they ARE individual by submitting entries to YADB in a style unique to themselves... and irritating to the rest of us. Examples include random capitalization, use of *!-^# and other characters to highlight their entries (but are not part of the actual song title or artist information), and in some occasions, obviously fraudulent/hoax listings.
The bottom line is that you get what you pay for, and YADB is no replacement for CDDB. In fact, I have noticed I am spending more of my time using programs other than Media Jukebox to deal with ripping CD's just to avoid my usual irritation at having to edit/correct/create YADB's results so I can keep my personal music library in some sense of order.
The competition isn't following Media Jukebox's trend, and I can eventually see myself cutting way back, if not dropping the program entirely just for this reason.
I would strongly urge you to reconsider your decision to stop supporting CDDB. It's an important feature for me, and I suspect at least several others.