BarCampLondon3 in November 2007 is of a talk by Dirk Olbertz of noserub.com, an open source decentralised social networking protocol.
Have a look at the video below to find out more about Noserub.
There's been a lot of buzz about Google's OpenSocial (which MySpace are participating in), which was announced in November 2007, and about data portability - which all need to be considered together, in my view. It's too early perhaps to say how Noserub will fit into all this.
OpenSocial has certainly been developing apace (e.g. social gadgets) which isn't surprising with Google behind it. For those interested, the Open Social announcement video is below (more OpenSocial videos etc).
Open Social was announced at Google's CampFire One:
Although Open Social lets developers write an application once which can then be used on all supporting social networking sites, so it saves coders and programmers time and increases the potential marketability and adoption of their service, it does depend on sites to support it. That's why I'm much more excited about the possibilities of broader, more general open standards with data portability, which Google, Facebook and Plaxo have recently signed up to in joining the DataPortability workgroup.