[BobPalmer]

I see pretty comparable numbers of listings for Python, Ruby/RoR, Java, and .Net (although if you add up all of the nix web dev jobs and bundle Python, PHP, and Ruby together vs. .Net, you're going to see a lot more of the former).

For web dev in general the split is pretty even, but if I am looking more at startups or small shops, the balance shifts towards Python/RoR (with Javascript being pretty ubiquitous whether you are on .Net, Java, RoR, or Python).

Still see this more of a tooling cost issue though, which makes sense. MS licensing is not cheap, although I've worked with a suprising number of startups that are on the MS stack, or using a combination of languages.