Subpoena the journalists!

Interesting. The FBI has indicated it may subpoena the records of a number of journalists. No, not about that case, but about "this one":

bq. A Sept. 19 letter from the FBI directs Associated Press reporter Ted Bridis to preserve any documents pertaining to Adrian Lamo, stating that the request is in anticipation of an order requiring materials to be turned over to federal law enforcement authorities. The FBI said Wednesday that similar letters went to 12 other reporters or news organizations, which the agency did not identify.

Call me, oh, I don't know, absolutely out of my mind, but doesn't this set the teensiest bit of suddenly extraordinarily relevant precedent?