We have started the beta run of the Oracle Application Development Framework Essentials exam. We believe there is going to be a lot of demand for this certification in the upcoming years as more and more IT shops develop their own ADF based applications and uptake the upcoming Fusion Applications from Oracle. Getting an official certification on your resume is probably a smart move for your career.
One note of caution - this is not a trivial exam - you should only apply if you actually have practical experience developing with ADF.
Anyway you can get the full details about the exam and the material you are expected to know here.