Given that Fitz is running his operation out of "Counter Espionage" offices at DoJ (as reported in the WashPost last week), I would agree that the Wilsons have been and remain a target of interest.
Forgetting about a meeting with a journo does not rise to the level of "espionage".
Something or someone in the Plame/Wilson milieu is maintaining Fitz's interest.
Have either of them appeared before the Grand Jury?
The Saudi or the French connections? Wazzup?