So, what do AJAX and SOA have in common? The answer: Everything.
Is AJAX an enterprise technology? The answer: Absolutely.
As we move to next-generation enterprise architectures using newer notions such as Service Oriented Architecture (SOA), there's a need for a dynamic Web interface that can layer over services and provide more value to the enterprise. Moreover, the enterprise in general can benefit from the advantages of AJAX; it's just a matter of making enterprise developers as well as the SOA architects aware of AJAX.
AJAX is becoming the standard dynamic interface for the Web. It adds value to SOA as well, providing the core-enabling technology for user interaction no matter whether we're dealing with applications that are remotely hosted or local to the enterprise.