What characterizes these technologies
- Web2.0 (such as del.icio.us & its-like)
- Grid computing
- Semantic Web
is that they’re open, free (as in freedom), bottom-up, disruptive: x-times better/faster/more powerful than the technologies that existed before them (think cars & carrieges, &c).
There’s another thing – an architecture of participation, meaning that it’s by people & for people.