There isn't too much "Web 2.0" tech behind building something Watson. Perhaps the use of ontologies and semantic web datasets, but in academic circles at least

There isn't too much "Web 2.0" tech behind building something Watson. Perhaps the use of ontologies and semantic web datasets, but in academic circles at least that's informally referred to "web 3.0" (that, too, is a bit of a misnomer because Cycorp has been building semantic ontologies for a long, long time).