The Indeed job search engine has a nifty feature that lets you graph job trends for a set of key words or phrases. Here’s the graph for Semantic Web and RDF, OWL, and Semantic Web services (click to enlarge or modify):
Adding in some other new web technologies (RSS and Web 2.0) helps put this in context:
And mixing in Java provides a lesson in humility:
But maybe there are a lot of ads for baristas that are throwing the numbers off.