WS-MetadataExchange, the Web service standard that specifies how information about a service's interface, policy, and other metadata can be retrieved at runtime, has been updated to version 1.1.
Sun Microsystems has launched the open source initiative called Project Tango. Windows Communications Foundation Engineers are working together with Java Web Services Engineers on the interoperability of enterprise features.
.NET and Java interop can be made really simple using a REST documentcentric approach. This article compares a REST and SOAP approach to interop as well as the advantages of using HTTP POST vs. GET for REST invocations.