I had a 4D ultrasound done at Prenatal Peek in Myrtle Beach, SC on July 23, 2003.  I was 23 weeks pregnant at the time.  It was nice to have a relaxed, unrushed ultrasound.  It lasted almost 45 minutes.  And, best of all, we found out that IT'S A GIRL!!!!  (Too see a larger view, click on the picture.)
This is probably the best 4D shot we got.  You can see her face in the upper right, both eyes and nose.  Below that is her left elbow, and below the elbow is part of a leg.
In this one she's looking down and has her hand on her forehead. 
Here you can see her ear in the upper left and her left hand/arm in the lower right.  Her right arm was across her face which is why it's all dark & blurry.
Here's her leg.  Think she'll be a Rockette when she grows up?
It's a girl!  Imagine that she's sitting on a glass table and you're looking up from below.  Her bottom is on the right and her knees are toward the left.  The arrow is pointing to her you-know-what!