Here's some ultrasound pics!
The first one is of the 7.5 week shot, when I first found out about the twins...
The next set is 11.5 weeks, and after all of the shock!
I love this one, especially when it's flipped. You can make out the nose and eyes better, and the feet looks like it had been moving around while the photo was taken.
I believe this bottom one is a bird's eye view (of both):They were both moving around...bobbing their heads and kind of squirming as they will. It was very strange and wonderful to witness.