John Evdemon made two points on SOA relevant to this issue several months ago:
SOA does not enable or ensure the alignment of IT and business. The IT industry has been promising this for decades – there is no silver bullet for aligning IT and business. Alignment of IT and business is an organizational issue that will not be resolved by an architectural design philosophy alone.
Service Orientation will happen in your organization in one of two possible ways: chaotically (typical approach) or in a disciplined manner. The path your organization takes (and the cost of later fixing that path) is up to you.