Yahoo has joined the ranks of large online businesses like Google and Facebook who have made it a practice to disclose the number and kind (if not all the details) of requests they've received from government agencies for user data. Its first report (you can read it here) lists "12,444 requests from U.S. authorities relating to a total of 40,322 user accounts." Those numbers are only part of the story, though: at the bottom of the linked report, note this disclaimer from Yahoo: "The numbers reported above include all types of government data requests such as criminal law enforcement requests and those under U.S. national security authorities, including the Foreign Intelligence Surveillance Act (FISA) and National Security Letters (NSLs), if any were received. The U.S. Government does not permit us to disclose additional details regarding the number of requests, if any, under national security authorities at this time, or even to separate them in aggregate from other requests. Additionally, the government would not authorize us to separate NSLs from other government data requests or to express the NSLs that we have received, if any, as a range from 0 to 1,000—even though the government allowed other providers to do so in the past."