Being Apple, could they possible have a joint announcement planned for both the facility and for a total makeover of XServe line (emphasizing GreenPower, price-wise farm-suitable servers). Would it not be embarrassing for Apple to stock the place with a non-Apple product? At the same time, would it not be absurd to risk the success of a data center this size on an (relatively) inefficient, second-rate hardware config?
Either way, it should be an opportunity for a huge Apple PR event.
http://nighthacks.com/roller/jag/entry/steve_jobs_comments_o...
Alternatively, I might just be full of Mac Mini Server boxes — but I wouldn't bet on it.
"data center environment consists of MacOS X, IBM/AIX, Linux and SUN/Solaris systems." and more details on the infrastructure and networking parts.