Its sad to see things like this happen, but I'm certainly glad id isn't being sold. Though I was initially annoyed at Adrian Carmack for apparently trying to sell the company out for his own benefit at the cost of his co-workers (and the fans probably), I'll probably never know the whole story until "The Masters of Doom 2" gets written (if ever).
As far as id's decline goes, it certainly seems noticable how many companies are now licensing Unreal Tech instead of id's tech. Although I enjoyed Doom 3 and it scared the hell out of me in places, Half-Life 2 was overall a better game (aside from Steam & related issues).
I'm glad they "farmed" Quake 4 out to Raven. I like Raven games and it frees id up to make that new franchise.
Anyone know what stakes the other co-owners have at id? I was surprised that Adrian had a rather large 41%. Since he, Kevin Cloud and John Carmark are founders, I figured they'd have large stakes, but how'd he get that much?