I read Paul Sorensen blog : Sun certifications will be renamed next week.
For instance the Sun Certified Network Administrator will be Oracle Certified Expert, Oracle Solaris 10 Network Administrator.
But to get the OCE Solaris title, you need to upgrade your certification [...] to receive an Oracle certification title (check more details on the Oracle Certification website here).
I never upgraded my Sun credentials, I am a Solaris 2.6 system admin and Solaris 7 network admin, but this equivalency with OCE surprised me.
There are even two OCM Java certifications : Oracle Certified Master, Java EE 5 Enterprise Architect, originally Sun Certified Enterprise Architect (SCEA) and Oracle Certified Master, Java SE6 Developer, originally Sun Certified Java Developer (SCJD)
Also, since a few months, there is an upgrade to the 9i OCM DBA certification : 11g OCM Upgrade. I hope I can do this one