This sort of configuration is, in my book, the future of medium- to large-scale network serversat least for the right types of applications. Bust servers into arrays, use IP networks to interconnect them, practice load balancing, and you're good to go. If a server fails, just pull it out of rotation. If you need more power, add some servers. And most importantly: use off-the-shelf, component parts to build your servers. None of this proprietary hardware junk for me, thanks.
Their setup is similar to the stuff I get paid to play with during the week. But mine's better. :)