My uni had it. The class was a first-year class. For me it was mostly a rehash of issues we'd discussed in chemistry and biology in high school, but for some students it seemed like new info. I actually thought it was becoming a fairly common course requirement.
But like Smokering, I've met grad level science students who talk about scientific theories being "proven". By that level, it seems to me, a basic understanding of the scientific method would be expected.
All this being said, it strikes me that if I said "The theory of evolution is a very good scientific theory," and someone else pointed out that I couldn't "prove" it, I would say - So what? It really isn't an argument about taking any scientific theory seriously, though I see many people who want to argue against ideas like evolution using it that way.
The only thing it's useful for, I find, is making people who think science is the only way to knowledge understand that it actually depends on more basic reasoning and assumptions, and so to take science seriously means to take those things seriously too.