Johannes Ernst: The brilliance of RSS 2.0 does not lie in all the features it has, because it has very few. Instead, it lies in how many features are left out, so it could be a trivially simple format, while remaining extremely powerful. [cut] We need a version of FOAF, the social networking format, that is like RSS 2.0 is to RSS 1.0. [cut] We need something much simpler, so FOAF-type information can explode like RSS has.
http://netmesh.info/jernst/Big_Picture/need-simpler-foaf.html
Randy: Johannes is correct. Further, we need a completed FOAF spec, not the half-baked FOAF spec we have today.