In addition to live streams, recordings of each event should be published on meetings-archive.debian.net. There is an RSS feed of these, which should work nicely in Miro: http://meetings-archive.debian.net/pub/debian-meetings/2008/debconf8/index.rss. That feed is also included on Planet Debian. This is the first time I've tried generating RSS so apologies in advance if I make a mess of the Planet.