Sounds like this REST stuff just might catch on. Resource oriented architecture, state transfer, entity tags ... ESRI is putting the Web back in "GeoWeb". Congratulations to Jeremy Bartley, Keyur Shah, and their team. Meanwhile, here in FOSS4G land, it's a different story. Christopher Schmidt and I have proof-of-concept (or better in the case of FeatureServer) RESTful services, but otherwise it's still all W*S, all the time.