My post from a past thread:
Looks to be one of these per WhoIs:
http://www.ubiquityservers.com
Or...
http://www.hypernia.com
Neither looks to be anything special.
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Ubiquity has dedicated servers, but I don't see anything about MMO infrastructure. Hypernia offers MMO solutions, but doesn't give any details on hardware.
If Xsyon isn't currently running 10-20 machines with enough pipe (bandwidth)... I don't know how it's going to make it. Darkfall uses 80 IBM blades. As of about 4 years ago, EVE used 84 IBM blades.