Summary on webservice
1. SOAP based can make use of WSDL 1.1, and WSDL 2.0, default is JAXB binding, also can use JSON binding.
2. RESTFul (HTTP) based can only make use of WSDL 2.0, So far(Sep 29 2009), cxf has not offer the support for WSDL 2.0. But Axis2 do.
3. The standard way to write the RESTful web service is JAX-RS(V1.1 so far). 4 implementations are restlet, restEASY, Jersey and CXF.
4. CXF can merge the spring support of rest, and also support WADL(v 1.0).
5. CXF is the good choice, because 1)offer the json provider except jaxb provider. 2) can be the basis of the D-OSGI in the future.
6. .NET platform , that is , WCF 3.5 only support WSDL 1.1. But, it has good support to Rest Webservice.