Take a look at this article: http://www.omgubuntu.co.uk/2010/05/linux-powers-91-of-worlds-top-500.html

Linux powers 91% of the worlds top supercomputers! Most of the posts on this blog are about ubuntu for reason, it rocks. simple. Its just such a pity that in this rapidly changing world of ours, that there are so many people who are too scared to change and simply think for themselves. Just because everyone uses Windows, and that the latest craze if Apple Mac, doesnt mean they are the best. Theres a little saying that goes: “Always listen to experts. They’ll tell you what can’t be done and why. Then do it.” – Robert Heinlein.

Over n out, and keep watching this blog for a detailed explanation of DNS tunneling and how to set it up!