I have shown this to a few of my community members. They're all impressed.
One thing that came up, is the ability to leave comments in other areas. Which, I think perhaps you might consider at a later date as an add-on to this app?
The ability to post to a database (IP.Pages) content, blogs, downloads, etc would take this to a whole new level.
If you did, I would have no problem paying for the add-on as I don't think it should be requested under this app as it stands. Yet, I think you may get a lot more sales with this and any potential add-ons. Something to pitch and think on. 🙂