Based on ABC News sources (and our own video camera) it appears that at least two witnesses testified before [Patrick Fitzgerald's] grand jury last Friday, both close associates of Karl Rove.
ABC News has learned that one was Susan Ralston, Rove's long-time right hand. The other, per ABC News' Jake Tapper, was Israel "Izzy" Hernandez, Rove's former left hand (and now a top Commerce Department official)....
Guess who gave him that nickname.
And babbled gibberish while doing so.
(Note link via Kos.)