MVP here stands for "Most Valuable Professional". The MVP Program, as described in a blog post by Anders Ohlsson (Staff Engineer, Developer Relations at Embarcadero Technologies), is a program tailored to recognizing awesome advocates in our great (Delphi developers) community.
MVPs spread the word about Embarcadero products through: in-person presentations, meetings, user group meetings, conferences, etc.; Writing for developer web sites; Webinars; Videos; Blog; Newsgroup; Articles in magazines, books, etc.; Social networks (Facebook, Twitter, YouTube, etc.) and more.