Point-Counterpoint: Web Services vs. REST/POX for SOA Interoperability - Nicholas Gall and Roy Schulte

Presentation is here

Best definition is on WOA I have seen to date

Interesting comment on WOA moving into the A2A space

WOA lives with HTTP as a transfer protocol not just a transport - more generalize the interface

Structure and Trust then SOA is appropriate Ws-* - WOA is a faster 

ATOM is the potential solution for the lack of WSDL