This was based on a question on Quora that I saw yesterday:
http://www.quora.com/Computer-Programming/What-are-the-best-... -- It doesn't include all of them, and as the output.log suggests, there are many which I couldn't find an RSS/Atom for automatically given the 20 minutes I spent on the task. So, feel free to extend the list, or add a better way to discover the blogs that don't have an rel="alternate".
But, until then, enjoy the OPML that exists now!