"Server" is kind of a nebulous term here: it sounds like you want to put a bunch of XBones together and have them "do something", but the end goal is not well defined.  You can make a server farm in a closet just by stacking them up, powering each, and linking them via switch/router.  Assuming you can get some *nix OS on them, a cluster for parallel computing work can just be separate machines with rsh to run remote jobs.

Many times I've thought to myself "I have all these computers, why not link them up and..." but I have yet to find an ending to that sentence which would justify the effort.  I don't do serious math computation, work with huge data sets, render movies, recompile whole distros, or any of the other typical use cases which people set these things up for.

Thank you Greg -- I will work on defining the "end goal" and what I wish to accomplish more clearly when I update the project. You're right, I didn't justify the effort at all and these things will be updated and rewritten accordingly. Again thank you for your're help, it's appreciated. Darksider 7

What I can think of is virtualization, or just setting up a redundant Gluster which is later shared with Samba.

The primary issue I can think of is getting something like Linux to run on an XBone, which involves breaking the DRM.