In true Cthulhu fashion, after encountering it at a medical facility where the lead programmer bragged about how amazing it was, I bought a book on the language. I like collecting language books (Icon was fun), but that was rather painful to read through and I have done IBM JCL and found it not unpleasant.
The NY Times a few summers ago wrote up some firm in Wisconsin that handles data-processing for quite a few insurance companies, using MUMPS. A co-worker's son a summer or so before had weighed competing internships from that firm and from a financial company in New York. I said I thought that the latter would offer more portable experience.
