Mindy and Phil just sent out another update with their Ultrasound pictures (as of Feb 21). The pictures are getting more and more detailed. (No more amorphous bean-shaped blobs...) They even have a 3-D rendering of the images.
I'm put the pictures here on my Web page. They are in a powerpoint presentation, with some key features labeled. (If you don't have MS Office, the document also opens very nicely in OpenOffice.org)