Unity vs XSan

I had to take down the section of the Avid vs FCP article dealing with Unity. It seems my understanding of FCP SAN solutions is out-of-date. XSan seems to have had a real impact on large FCP installations. The FCP mailing list is buzzing as we're all being brought up to speed and I'll be going through some PDFs to better understand how it works.

I'm holding off wider distribution of the article until I'm sure its updated to fairly reflect current realities.

Geez. I had forgotten why I don't update this article very often... it's nerve-wracking trying to get it right.

- pi