Apple has posted a page on xSan.http://www.apple.com/xsan/
It's a professional network storage solution. 64 machines can thus share up to 16 TBytes of data. The software can also dispatch the data redundantly on different servers to avoid dataloss due to breakdowns.
As you may have guessed, this software which will cost 999$ is aimed at closed professional circles. But some big storage and bandwidth consumers like news editors or firms such as Pixar will enjoy that.
