If you're interested in this topic, Robert Haas (the author/committer of the feature) also wrote two posts after I published this, which talk more about incremental backup:
I'm actually subscribed to your blog in my RSS reader, but I completely missed this article (any many others) when it was published because it didn't show up in the RSS feed.
Good point - its set up this way since we intentionally don't syndicate the 5mins of Postgres episodes to Planet Postgres, but I could see the benefit of having a complete feed that includes everything, for those subscribing via RSS readers. Will see what I can do :)
I'm actually subscribed to your blog in my RSS reader, but I completely missed this article (any many others) when it was published because it didn't show up in the RSS feed.