Developer certifications

Does anyone know of a company which is offering or planning to offer PHP developer certifications? Arguments against certification programs aside[1], there are a lot of companies which prefer certified developers, even to the point of assuming a project done in ASP will be better than the same thing done in PHP simply because the ASP developers are Microsoft certified. While this seems like an interesting sideline for a company like Zend, I'm also somewhat curious about whether an "Open Source" test could be developed. It'd certainly have to be quite different from normal tests and that move away from easily memorized answers would probably be a very good thing. [1] We've all heard them before. I'm personally in favor only of certifications like certain devilishly hard Cisco exams which measure more than multiple-choice memory.