I remember I really liked the way that starwars.com did text commentaries for the DVD releases that you could access through dvd.starwars.com (I think). I suppose something like that might be possible as well, though I don't know how it would be done.

Currently no one I know of is working on a text commentary, though talk of it continues. I'm certainly willing to put my knowledge into such a project. Probably the best thing to do is get the commentary text written first, and then worry about the technical details of making it work.

--SKot