I think piasa is correct and it has something to do with this:
Reporters and Federal Subpoenas
As reporters facing contempt charges in a number of federal cases around the country, Congress is taking its first serious look at a reporter's shield law in decades.
Current as of: 11/29/06
Federal shield law efforts
Status: Awaiting new proposed legislation from the 110th Congress in 2007.
This is interesting, too:
Specter: White House needs to explain leak
Former diplomat says administration engaging in disinformation
This is all going to be handled by the new Democrat congress as part of their "ethics" reform. Spector is fishing for information about what Rove/Libby may have done that could be construed as unethical.
Of course the Wilsons are glad to get a free steak dinner and fill Spectors head with more crap.
My opinion is Reid will be going after Rove/Libby again to take the pressure off himself. The Wilsons are another prop. Dang, I thought they would just go away.