Continuing the thread started by The ACLU's feeds, a couple of new goodies for RSS developers and expert users.

1. A new collection of feeds for The Guardian. It's a really good news org, no paywall, and covers a lot of territory. Based in the UK, but it covers the US very well.
2. A river that's formed from the updates to the feeds in guardian.opml.
3. A little Node app that reads an OPML file and reports on the feeds it couldn't reach. I used it to determine the feeds in the Guardian list were accessible. Just change the OPML url to check a different set.