In a Groove space (with Jon, Jeroen, Tim, Matt and others) we're having some really good conversations about integration of Radio Userland and Groove. Matt bootstrapped this with a thoughtful piece about their relationship, and Jon has been asking lots of good questions. Here's one of my posts there.

Radio is neat for several reasons (and every day, it seems, Dave invents more). I've spent a while trying to abstract the real nuggets in there, and there are loads. But I think a key one is this: the Radio web is a peer-to-peer information network, where the routers are humans. Radio's subscription, aggregation and publishing functions are subservient to the routing function.

That sounds kinda like "gnutella search by carrier pigeon" - the latency of transmission is measured in hours, if not days.

But in practice it's really powerful, because the routers are "tuned" (in really human ways): we pick up and forward things which resonate. Not by creating (say) RDF-encoded tables of "who knows what" and "who knows who" (link) but by cross-linking the knowledge network in ad-hoc ways.