I'd argue that governance is no more and no less a big deal in SOA than it is with any other architectural approach. If one is to establish enterprise-wide guidance/constraints on solution designs, then governance is key regardless.
Bummer that the article seemed to equate SOA and web services. "...said Web services standards are making it much easier than in older approaches such as EDI." Hmm, really? I remain skeptical about this anecdotal claim. Issues with EDI exchanges usually have nothing to do with process and everything to do with message content--something that doesn't magically disappear with "Web services standards." And those don't address content in any meaningful way. Content and layout are the issue, not how said content gets there. -Rob
