There is quite a number of people who have taken exams to become certified in Google Partners’s AdWords management. Google Partners has just released a new exam for Google Shopping certification.
Those taking this exam will be tested in their proficiency in creating Merchant Center accounts, organizing product data and managing and optimizing Shopping Campaigns. Of course, passing the AdWords Fundamentals exam is a prerequisite.
There are a number of training modules available on the Google Partners site to help teach people who are interested in taking the Shopping test.
Shopping Certification is currently in the US, but will expand to other countries in the near future.