I just liked to share some links about what we are researching..
We're looking for a good social platform to start from:
https://www.ruby-toolbox.com/categories/social_networking
There are some cool stuff like this:
http://social-stream.dit.upm.es
But we need to do some good research to have a good choice.
Another thing is that we are making some research about existing
relating ontologies, especially SIOC:
http://en.wikipedia.org/wiki/Semantically-Interlinked_Online_Communities
The last thing is that we are looking for the right tools to deal the RDF stuff:
https://www.ruby-toolbox.com/search?utf8=%E2%9C%93&q=RDF
Most attractive project is ActiveRDF, which is very similiar to ActiveRecord.
Other interesting links:
http://www.slideshare.net/metade/linked-data-on-rails
http://www.eyaloren.org/pubs/icwe2007.pdf (Extending Ruby on Rails for
Semantic Web
Applications)
Will keep you updated with everything new.
Amjad