I love this kind of stuff: http://news.cnet.com/8301-1001_3-10209580-92.html
Here you have a company that's entirely about the efficiency of massively parallel systems. They're finally pulling back the current a bit and showing how best it works on a scale of 1000's of servers. One shipping container alone can hold 1160 servers! WOW! The ideas about 12v only in the PSU and the onboard battery are brilliant!
I want a couple of these for myself! Heavy processing and lots of memory with just enough hard drive! Trim the energy and heat like they do and you can do a lot with that.