Even Microsoft is taking official notice, as this white paper shows.
Nick Petreley, a columnist for InfoWorld, has an article discussing this attention, along with commentary by readers.
To see the kind of buzz that Linux is generating, take a look at the Linux Weekly News, which offers a roundup of Linux articles in the press from around the world.
A quick search at any internet search engine for "Linux" and related topics will give you an idea of the enormous and growing popularity of this system.
Linux is even having a noticeable impact on Microsoft, at least according to this story in the Sunday Times (London).