Charliemopps writes that the Washington Post
reports "The NSA is collecting hundreds of millions of contact lists from all over the world, many of them belonging to Americans. The intercept them from instant messaging services as they move across global data links. The NSA is gathering contact lists in large numbers that amount to a sizable fraction of the world's e-mail and instant messaging accounts."
According to the leaked document
as a PDF), the NSA is intercepting some chat protocols and at least IMAP, and then analyzing the data for buddy list information and inbox contents.