There is an
interesting article in the International Herald Tribune today that discusses the impending balkanization of the internet using tools such as your script (i.e., servers denying access based on geographical location).
I´m not convinced it will become as widespread as the author seems to believe, but it´s a good read.
Matt
Update: The original IHT article, from Jan 4, 2002, can now only be found on The Washington Post archives although it requires a pay-per-whack account for the full fetch. :-(