Graph of programming languages people used in 2012
I came across this link representing a visualization of programming languages usage based on a hashtag collect : http://www.ioncannon.net/projects/code2012/
Although this method can be criticized, it provides interesting data : JavaScript is the clear winner with Java just behind. We can see Scala is a growing language too, it has been used more than PHP last year (according to this study).
If you find another study on this topic don't hesitate to comment this blog post to let me know.IntelliJ 12 Darcula + Monokai
Loïc Descotte shared via Twitter an excellent color scheme for IntelliJ inspired by Monokai color scheme.

You can grab it at the following link (Monokai color scheme) or get the complete corresponding settings jar file here.
Setup is simple, under OS X you have to do the following (and then
select the corresponding color scheme in settings) :
cp ~/Downloads/GreaterMonokai.xml ~/Library/Preferences/IntelliJIdea12/colors/