Well, reddit does offer rss support. So you could, for instance, subscribe to a mult (e.g. reddit.com/r/programming+python+nim/.rss) and discuss the articles you want to discuss with the community.

The cool thing about using reddit this way is that you can use your reader (like Thunderbird) to process your feeds according to rules. For instance, you could automatically delete all posts from /r/programming which don't feature Nim or Python.