I attended this workshop a couple of days ago. It was an interesting mix of ppl with different backgrounds; computer scientists, researchers, lawyers, some practitioners & users like a SN provider, some artists who run social network services, and my interest was of course teachers' social network services like our eTwinning platform (more than 70000 teachers).
I enjoyed the keynote by Ronald Leenes from Tilburg University. A few projects that he mentioned, PrimeLife (Bringing sustainable privacy and identity management to future networks and services) and BROAD (Broadening the Range Of Awareness in Data protection).
EUN is now running a http://www.dataprotectionday.eu/ campaign, here is my favourite film about it!