Many have asked and I keep promising it with Ruby Quiz 2.0, but I've added an RSS feed to the current Ruby Quiz site, to hold people over. You can find it at:
The feed gives the last ten quizzes. I didn't include summaries because they're pretty lengthy, but you can use the article links for the quiz in the feed to get to them. Be warned, I chose to include whole quizzes, so the feed is a bit lengthy.
Sorry it took me so long.
James Edward Gray II