Please don't get too excited over nonsensical ramblings by a shrill journalist. I can remember all the high hopes for firewire that never came true. It was never used for anything other than disk interface and video, ThunderBolt will probably follow suit. Besides, Mac Minis are always going to be made with cheap laptop components and underpowered/obsolete processors/chipsets/memory, not exactly the best route to take for powerful multiprocessing.
So far my Mini Server has turned out to be a fantastic replacement to my Dell Poweredge 1600SC. I am running 3 VM's on it without a hitch. I also had 3 VM's running on my Dell with Xen.