It's nice to see a self-hostable alternative to Disqus. It's not likely to make me stop using Disqus, because I like the convenience of not having to deal with the hosting myself, but it makes me feel more comfortable knowing that if Disqus ever became evil I could move away.
<i>Juvia currently also makes no effort to support nested comments. I believe nested comments only make sense for extremely active discussion forums.</i><p>Quite the contrary, high traffic sites like facebook have single thread comments where everyone keeps repeating the same things. Threaded comments are necessary for discussions.
For what it's worth, I've got my own Disqus alternative: <a href="https://github.com/alexandru/TheBuzzEngine" rel="nofollow">https://github.com/alexandru/TheBuzzEngine</a><p>You can see it in action here: <a href="http://thebuzzengine.appspot.com/" rel="nofollow">http://thebuzzengine.appspot.com/</a><p>However, on my blog I have switched back to Disqus. Mostly because the only thing bothering me about Disqus is its bloatness which makes the page take a performance hit, but other than that it works great and you can export your comments at any time.
I think the primary reason I use Disqus instead of coding my own comment server is for its community.<p>When you have Disqus powering your comments, you have two ways of contributing to this community: by commenting on other people's thoughts (be they blog entries, photos, or news articles) or by writing your own entry and having people comment. You're basically getting a free identity system without the complexity of OpenId or the control of Facebook. I like that balance.<p>I'm not sure this software can give me that, but I'll be happy if it does.
The test page <a href="http://juvia-demo.phusion.nl/admin/sites/1/test" rel="nofollow">http://juvia-demo.phusion.nl/admin/sites/1/test</a> is giving a 404