Richard puts it even a little bit harsher "The whole SOA/ESB thing is all hype, people! Once you come to realize and accept that, the world becomes clearer. You don’t believe me? Define what SOA is. Then try and find one other person that agrees with you wholeheartedly. If you’re lucky enough to manage this, try and apply your definition of SOA across more than one platform / technology. Repeat for ESB. Good luck!" (See
I think the general concept is quite interesting but I'm not really sure when I will ever see an actual implementation of SO design. I recently took a look at FABRIQ recently - which combines service principles, one-way multi-transport messaging, queuing networks and ideas from autonomous agents into a single framework. Fabriq is no services framework but does show the complexities involved when creating a complete SO design. The Microsoft Patterns & Practices group has also published an “Enterprise Development Reference Architecture” which also provides some interesting guidance but which I think is quite complex as well.
If you want to know more, check out these interesting postings about SOA lately: