In a quick search for 'Blender' on a job listing website, there is (at the time of writing this article) 2 entries that includes it on their requirements list.
Maybe with Big Buck Bunny release, there is a good chance of Blender starting to get more and more into mainstream CG pipelines. Take a look at the repercussion of the trailer release on an application agnostic forum like CGTalk. To quote a user on that thread, who is one of the forum admins:
Do you guys hear that loud crackling sound,
That is the sound of change.
Of course, we would ask that you treat the listing professionally and only apply for the job if you've got what they're looking for. Let's not make them regret putting "Blender" in the job description, right? ;)