Hi Paddy,
Yes, the animation of the high velocity stars in orbit around Sag * is extremely impressive. We really do live in a golden age of discovery, so many of the advances that make research such as that of Andrea Ghez possible are just not known by the general community.
This animated demonstration of the Keck view of the galactic centre with adaptive optics turned on and off is a great example of such an advance.
http://www.astro.ucla.edu/~ghezgroup.../aoMovie.shtml
Regards
Trevor