She’s testifying now in front of the House Oversight and Government Reform Committee. C-SPAN is covering it live, and you can watch it on their video feed.
UPDATE: If you can’t watch, FireDogLake is live-blogging the panel, and doing their usual excellent job of it.
UPDATE: If you’re having trouble with the C-SPAN feed, try this one directly from the Oversight Committee. I hear it has superior sound and clarity.
UPDATE: Thanks to PoliticsTV for putting up this clip of Valerie’s testimony.