I’ve recently rediscovered the IxDA.org discussion forum, and I feel compelled to do a post on it – not only is the actual content great, but the web-interface is really nice, keeping the posts tidy and making them a easy read (unlike email digest mode which is a mess).
If you want to be a lurker like me, try subscribing to the Threads RSS feed. This gives you an overview of the discussion topics, and links you through to the web interface if you want to read more.