Hi Cortlandt,
Thanks for your reply. The ability to extend a discussion thread in a domain-specific way would definitely be useful. Imagine a photography forum, where a user can post a photo, and ask for help in post-processing it. Other members could hit reply, use the interface to adjust the curves or whatever, write a comment, and hit post.
Like I said, I think I could do it in-line in the post, but other layouts would be tricky. It may require a generalisation of the main topic template, so that extra “columns” can be added to the sequence of posts. Like you say, mobile would be tricky, but it sounds too hard right now.
After trawling through Discourse code, I’m leaning towards a custom solution, maybe with Meteor. Although, Discourse certainly is pretty…