from bbc: Pakistan's attempts to block access to YouTube has been blamed for an almost global blackout of the video website for more than an hour on Sunday. BBC News has learned that the outage was almost certainly connected to Pakistan Telecom and Asian internet service provider PCCW. A leading net professional said the global outage was "probably a mistake". Pakistan ordered internet service providers to block the site because of content deemed offensive to Islam.
update: details emerge on youtube block
from bbc: Pakistan has rejected claims that it was responsible for blocking global access to the YouTube video clip site. YouTube was hard to reach this week following action by Pakistan to block access inside its borders for its hosting of a "blasphemous" video clip.