Is there tool integration with standard development environments such as Eclipse to implement a service?
Yes. There is an integrated plug-in called the Enterprise Service Browser that is delivered as part of the SAP NetWeaver Developer Studio and which can be used to browse services in the Enterprise Services Repository and to create a skeleton implementation. In addition to Java, SAP provides an integrated toolset from within the development environments of ABAP and .Net (ABAP workbench and Microsoft Visual Studio).