@manton I second @grayareas; the flat conversations are very helpful for ensuring everything stays in context, but sometimes it is hard to guess (in longer conversations) which comment another is in reply to, so something like prepending the comment with a ↩︎ (or similar glyph; that one is confusingly used for both “reply” and “return”/”return from footnote to text” already on the web, so overloading with a 3rd meaning might not be good) that links to the comment another is in reply to would be helpful.
There are other use-cases, in play here, too, like Ron’s (wanting to be able to link to a single reply, clearly isolated, if not removed entirely, from the rest of the conversation, when writing a new blog post—which is harder to solve in the framework of the existing Conversation view), so I wonder if it would be possible to include the “in-reply-to-post-NNNNN” info in the HTML markup (at least as a hidden attribute) and the API so that 3rd parties could experiment with useful ways to employ and display that relationship?