There has been some debate, here and there recently about what is SCA v1.0 about? Henning Blohm is a Java EE Software Architect at SAP and co-chair of the SCA-J committee. In this article he gives us his answer.
it is easy to get lost in the SCA universe...[and there] is little experience with using SCA in the community.
The article contains a list of projects involving SCA as well as a series of references. He develops the argument that SCA is about:
... integration with existing technologies...A deep integration of SCA assembly with a given environment reduces nasty model frictions introduced by abstractions that try to generically wrap any sort of runtimes into one common "higher" runtime model.