According to the New York Times,
"Wikileaks began to post pager messages that were sent on September 11, 2001. According to Wikileaks, these messages were intercepted by an "organization which has been intercepting and archiving US national telecommunications since prior to 9/11." Some of these messages are from officials in police and fire departments, though a large number of messages are also from businesses."
I guess I should not be surprised that "an organization" was harvesting this info prior to 9/11 even though the individual messages appear to have no relationship to foreign policy, hanging on to it for nine years, and also not bothering to clean it up for analysis. But I am.
Oh, and did you know people still use pagers?