We have a dedicated demo site !
http://sdi.georchestra.org/ will publish modules builds on a regular basis to review and test the new features. We are using continuous integration with Jenkins to maintain a local repository, to build and deploy the modules and to perform scheduled tasks. The 8-cores server is operated by the PSC members.
We also plan to publish nice datasets through sdi.georchestra.org. We already published the NASA SRTM DEM and the beautiful night 2012 dataset. You can easily have a look on these datas with the new "predefined contexts" feature on the demo.
we hope that sdi.georchestra.org will be a full scale spatial data infrastructure with open datas and usable webservices.