I agree with Andy Blumenthal in his blog IT Governance and Enterprise Architecture that EA governance (and all forms of IT governance) should be integrated into a unified structure that ultimately reports into an overall business controlled IT board that controls all “think”, “build” and “run” investment.
There is a key point is that all communication from the EA board must be in business terms i.e. relevant, easy to understand and accessible - "user centric" to use Andy's definition. The EA board will lose credibility if it is seen as a technical control body or worse a talking shop. It must be seen as a vital business control function that ensures IT supports the business mission, vision, strategy, and goals.
In the minds of many business people, data management, interoperability, technology standardization, security, and other issues that architects look at are arcane and possibly irrelevant distractions that IT should look after under the covers. In presenting EA issues and recommendations to the IT board, we need to bring these items to life by using business language and explain how we are supporting business goals.