We have started the 0.6 series, which come with a lot of new features. The most striking of them is provided by social_stream-documents, the module that gives support for file upload. It also supports pictures, audio and videos, converting them to several formats for HTML5 streaming.
The database schema is now stable. We are providing migrations for the few eventual changes, so it is now safe to deploy in production. In that way, we will keep the data at http://demo-social-stream.dit.upm.es/
We are now focused on fixing bugs and making Social Stream a robust and reliable core for building social networks.