>If you're looking for a job in industry, my reply is to learn whatever is hot right now: C++, Java and C#--and probably Python, Ruby, PHP and Perl too. If, on the other hand, you're interested in enlightenment, academic research or a start-up, the criterion by which you should choose your next language is not employability, but expressiveness. In academic research and in entrepreneurship, you need to multiply your effectiveness as a programmer

Great, I'd love to see the studies on how much of a "multiplier" these leet languages give me. Hopefully I too can ascend to the mythical x10er because I use Lisp and Haskell.