Someone posted a link to this first video. I watched it, then in short order found myself watching the other two as well.
http://www.youtube.com/watch?v=o2aUJcsPT6Y
http://www.youtube.com/watch?v=o2aUJcsPT6Y
http://www.youtube.com/watch?v=GhEMx7SCtEM
I found these video's to be fantastic. They show the natural progression of movement. I think it's interesting to note how important core movement is. And to see how other movements come from core movement. This is a great example of how the body should naturally work. This kind of understanding can only help your Aikido training!
Enjoy!