Don't mess with the Internet.
Martin Brown gives more detail at the Renesys Blog, including a comment on how this incident shows that it's still a bit too easy for a small ISP to disrupt service by hijacking IPs, intentionally or inadvertently. Danny McPherson makes the same point at the Arbor Networks blog, and also gives a good explanation of how the Pakistan Internet provider screwed up what they were trying to do.
Somebody still needs to update the Wikipedia page on how Pakistan censors the Internet to cover this incident.
A "trailer" for Wilders' film is on YouTube here. Wilders speaks about his film on YouTube here and here. Ayaan Hirsi Ali defends Wilders on Laura Ingraham's show on Fox News here. (Contrary to the blog post I've linked to, Hirsi Ali was not in the Theo Van Gogh film "Submission Part One," which can itself be found here, rather, she wrote it. Van Gogh was murdered as a result of it. The beginning and end is in Arabic with Dutch subtitles, but most of it is in English with Dutch subtitles.)
UPDATE (February 26, 2008): This just in, from Reuters--Pakistan "might have been" the cause of the YouTube outage. Way to be on the ball with breaking news, Reuters!
The Onion weighs in on the controversy!