I know that many of my readers are telco guys, so you might not even know the difference between SOAP based web services and REST. I'll make it easier for you... In the parallel universe of SOA, SOAP is like H.323 - big, clunky, slow but complete. REST is like SIP - fast, light, scalable and composable, but incomplete. Anne from GigaOm just wrote a great article declaring a winner, and why.