If you're interested in finding out about how SOA is enabled in Microsoft Dynamics AX, there's an excellent video on the subject. The video is a presentation by Alex Renz, in product planning, and Michael Merz, the PM for AIF. AIF provides the integration framework in Dynamics AX. If you're investigating how to integrate Dynamics AX or want an overview of how AIF works, this video is a must-see.

 http://preview.microsoft.com/video/videoDetails.aspx?video=64568109-153e-4599-8667-0f8a74909ea2