Those unnamed sources

Being forced to use unnamed sources has often angered reporters, except in the cases where they invite the leak.

CBS White House correspondent Bill Plante says the game of identifying SAOs is an old one. He and Sam Donaldson would try to slip silhouettes of unnamed sources on the TV screen.

Henry Kissinger, who made background interviews a maddening art form, once offered reporters an endless interview on a long plane ride during the Ford administration. Then Post editor Ben Bradlee was so furious at the constraints that he ran Kissinger’s photo over the SAO caption.

So far the Bush administration has maintained discipline over its talking troops. But as the political season matures and the White House needs to get its message to receptive reporters, it might be forced to loosen its grip.

This Washingtonian article gives you names from the various government departments that you might expect to be the quoted sources referred to in the press as "Senior Administration Official".

Meanwhile,

Bill Keller says he will soon announce a policy at the New York Times that "cuts back on the reflexive use and the pointless use of anonymous sources," which has "gotten out of hand."  article

....hey, do what you want....you will anyway.