I've been looking into this as well, although you've got a lot more experience than me. What other certification programs compliment a set of completed Java certs (SCJP, SCWCD)? Oracle DBA OCA seems to be the logical choice, but I don't like how they require you to do an expensive training class to reach the OCP level, as opposed to Sun's program. In looking at other programs, the topics seem chosen with different positions (System Admin, Network Engineer, etc) in mind, or the exam material is so specific it really isn't of interest to me, for example I work with XML, but I don't really need to know parsing and validation inside out like the IBM XML exam requires. I guess this is why the Sun exams were such a good fit for a starting developer like me.
Do any Java developers here have any experience with non-Sun certification programs?
Edward are you looking specifically for training or for the certification? Unfortunately all I can contribute to your post is that I think the training for Introduction to Oracle9i would be rather easy for you.