Pirates of the Caribbean -- Movies and History

These books have footnotes, but the sort that are joking asides, not explanatory notes. So there's no footnote on the passing reference to ThinkGeek, to explain to baby geeks and non-techies just what a marvel it was in its heyday. Also no footnote on the characters joking about being able to get a gov't purchase order approved for a computer from Dell but not Alienware, something that comes off much more sarcastic ever since Dell bought Alienware. And I myself could have used a footnote to highlight the Bastard Operator From Hell reference that I initially missed.

Does anyone make footnote annotated editions of books before they're hundreds of years old? Or cultural context footnotes for cultures that aren't countries or languages? If $someone were to setup a wiki for such notes, with context provided by limited quotes from the original, what'd be the mean estimated time to error 451 (down because lawsuit)?