I tried out my own, one person instance, and I had a hard time getting comments to pull in. I would have to browse to the original instance to view all of the comments. Have you found a good way to overcome that?
I switched back to a more public instance just because I found the process of going out to view the content, back to my own instance if I wanted to comment, then back to the original again to keep reading the discussion very tedious.
Being on a more populated server seems to give most if not all of the comments directly.