>>Is this The Melancholy of Gryphon Suzumiya, then? When God
>>doesn't pay attention to the universe, reality gets unstable? :)
>
>Straight over my head, but from context, uh, yeah, something
>like that.

Quick plot summary of The Melancholy of Haruhi Suzumiya, as I understand it: Haruhi is, without being aware of it, the god of the universe that the characters (including Haruhi) live in. It's the main characters' mission in life to keep Haruhi from getting bored, or distracted, or depressed--because when she does, bad things start to happen on a cosmic level.

So to tie into the Matrix reference: what if the Architect took the blue pill?