So where is Dave Grossman?
 

The last we hard from or about him, we learned he was made the head of King's Quest project, and put in charge of putting the rest of the team together?

Has he shown up in the credits of any other project released since then?

He's in all of them. He's always the creative director on Telltale's games.

Strange, IMDB, never seems to list that fact. They only list him as being directly involved with a handful of games. Same with Wikipedia.

Or is it anything like Creative Director at Sierra, where Bill Davis really had very little do with any of the games, and just had his name in the credits.

http://sierra.wikia.com/wiki/Bill_Davis

From what I've read it seems like it's more like Tim Schafer's credit of creative director at Double Fine, where he has his hand in the pot with all the games (in regards to story discussion, game design, art direction, etc.), but generally lets the directors and writers run the show.