If you are working in a consulting company that is serious about their ADF work there are two types of ADF certifications that you should be aware of.
The first is the Oracle Application Development Framework 11g Certified Implementation Specialist this is meant for the developers in your organization - it is an exam that they can take that can give them a seal of approval that they know the inside and out of ADF. This exam has been around for a while and I highly recommend it to any developers who wants to be serious about a career in ADF.
For partners, another part of becoming a "specialized ADF partner" is having the sales force that can correctly position ADF to customers.
For this there are two new tracks offered by OPN:
Just one more indication that going into ADF development can be a good business move for your company.
For the full details check out the new Oracle Application Development Framework Specialization Criteria.