The feds are looking at reporter's phone records to ferret out confidential news stories, according to ABC News's blog, The Blotter.
Link.
This is not unexpected, given the government has publicly said it was gunning to find investigative reporters' sources and has already fired a senior career CIA official for merely not disclosing contact with a Washington Post reporter.
It does make the first entry of this blog seem more than a little prescient, let me also remind privacy-conscious reporters who feel they need to buy pre-paid cell phones that they should pay with cash, have someone else (pick a homeless guy on the street and pay him $10 ahead of time and $10 later) buy the phone so your image isn't caught on surveillance cameras, and be careful where you use the phone since the feds could use tower location data to tie the phone to you.
And yes, by the way, this is what happens when you build a surveillance architecture.†
It becomes VERY tempting to turn it to purposes it was never intended for.