Aside from the fact that jCert seems to have been discontinued two years ago?
I don't know honestly that it's really "worth" doing anything about. IBM's 486, for instance, is used for other things internally to IBM's own program such as the Enterprise Developer role for WebSphere 5.0. There are some exams that are accepted across company programs (
SCJP, for instance, in some cases), but aside from that, I don't know that there's any real utility anymore in worrying about the cross-company idea for certifications.
As to the benefit you derive from any exam or certification, that's something that (as I've argued many times before) is somewhat between yourself and any third party - it's a matter of rather subjective evaluation on the value of such a thing. I've found over time that certifications help to lend a sense of one's knowing what they're talking about when discussing technologies, but your mileage may vary.