Small problem with the article.
Omega Cent may not be a Globular Cluster. It seems that it is the core of a galaxy that has collided with the Milky Way and had most of everything stripped off of it.
The Wikipedia article explains better than I can.
http://en.wikipedia.org/wiki/Omega_Centauri
It also has some good references to back it up.
That all being said, this is one object I look forward to seeing every spring. I live just far enough south that we can catch it clearing the trees on clear nights.
Thanks Conan the Librarian.