It doesn't look like anything is left for jCert. However, my reading is that the same set of jCert tests will still be used for the IBM Certified Enterprise Developer role, as listed on
http://www-1.ibm.com/certify/certs/adedwssv5.shtml The IBM 486 OOAD UML
test has no equivalent competing test, and is a very good tests of knowledge in this area. Therefore I think test 486 is very much worth doing anyway. But as for test 484, it is pretty much equivalent to SCWCD and SCBCD together.
However, Sun and BEA are not doing themselves any favours by not offering job role certifications like Enterprise Developer.