I was reading a
Wikipedia entry about Bob today and I clicked on
this link and lo and behold, in the last paragraph, describing last year's Gridiron Club dinner:
...Novak starred in a skit about the Plame leak. Dressed in a top hat and cut-away coat, the columnist hammed it up in front of an audience of his peers, crooning to the tune of "Once I Had a Secret Love." Novak sang off-key about outing "a girl spy" thanks to "a secret source who lived within the great White House..."
Might be nothing, but Bob has said this week that Bush probably knows the leaker's identity...