I wrote an article based on my experience in SOA and fortune 500 firms in the last year:
Enterprise architecture framework is used to carry on enterprise architecture work for enterprises. Enterprise architecture helps enterprises to deal with today challenges such as low and regulation compliance, agility of the business and the IT, managing portfolio, making the CEO vision into reality and others. Dealing with business and IT agility touches SOA and services. In this article we’ll see how we can use architecture framework to map enterprise level services and set their granularity.
you can read the article on my site: http://www.theeagroup.net/ea/Default.aspx?tabid=39&mid=357&ctl=Details&ItemID=7
and I'll be happy to hear comments here.