On Friday we officially reached the Puzzle Complete milestone. This means that all puzzles that will be in the game when it ships are in the game now.
It does *not* mean that the game is done. We still have a lot to do! But it *does* mean that the nature of the work changes and becomes simpler, because we don't have to be making high-level creative decisions any more. It is now much more about turning the finish-the-game crank (making sure stuff plays well and polishing it up) for anything related to game design, modeling and texturing.
There are a few categories that still need creative decisions (story stuff, the menu system, etc), but for those of you who are awaiting the game's release, this is pretty good news.
There are currently 677 puzzles in the game. That number might be slightly different when it ships (we might cut a few, for example!)