Timeline Chart or Graph of GNU/Linux Adoption?

DNAman asks: "I'm preparing a presentation for the use of GNU/Linux in the biological sciences. One recurring comment that comes up is 'Linux is not mainstream, why should we be interested in it?' While we could debate the definition of mainstream, I think it would be more productive to illustrate the trend in use / adoption of GNU/Linux as a platform. Do any of you have decent data sources for this type of trend?"

an answer...

[kevin lyda]

ok, while morons babble about whether you should ask your question or not, i'll actually point you at an answer:

http://counter.li.org/ [li.org]

"linux usage" is hard to gauge. there's no central licensing authority (despite a certain moronic company's attempt). of course that argument is rather silly as closed software companies have to guess at their user base. for instance i count as 2 solaris users and around 10 windows users if you go by licenses purchased but i don't use either of those os's.

I hear that Netcraft is pretty good as a source

[Anonymous Coward]

Someone in the BSD section keeps on quoting it all the time!