National Security Letters ruled unconstitutional
"We are very pleased that the court recognized the fatal constitutional shortcomings of the NSL statute," said EFF attorney Matt Zimmerman said in a statement. "The government's gags have truncated the public debate on these controversial surveillance tools. Our client looks forward to the day when it can publicly discuss its experience."
The fact that the EFF's client has not been named serves to demonstrate the secrecy surrounding NSLs. Because of the gag orders, it has been hard to learn much of anything about the letters, including how they are used and how often.