A couple thoughts:
- Conversations are definitely the direction to go, in my opinion. If you click the "comments" link on my blog, you'll find yourself presented with an integrated, full-on discussion forum. The best of both worlds, really... the focused, individual expression of a blog, backed up by the flexibility of a real conversation platform.
- If it's possible, you might consider having this comment page display the parent entry. I found myself wanting to refer back to something you'd written, and had to open a new browser window to do it.