The Social Graph is Neither
rdf technology is coming on strong in late 2011;  the tools are getting better fast -- we will be able to represent the social graph in more detail,  and correlate it with the 'semantic graph' that shared human experience is coded in.yes,  RDF has taken a while to mature,  but look at the time lag between Codd's paper and the commercial release of Oracle. 1000 flowers have been blooming for years and we know a lot about what works and what doesn't.the trouble with foaf and other 'distributed social graph' is that muggles like Facebook the way it is...  they don't care about data portability or privacy;  unless a distributed system can provide a better user experience,  it's got no hope.