Project Dialogues is a comment hosting service with a lot of different customizations (where to store, how to show, etc).
Project Dialogues allows you to add support for commentaries on your web site or blog in couple seconds. This is an example with minimal configuration http://jsfiddle.net/K5D4c/ and this is an example with different set of customizations (markdown support is one of them) http://jsfiddle.net/Wh5q7/4/. And of course you can try example on http://outcold.2013.nodeknockout.com/ with Markdown, Scrolling support, Instance Updates (with help of sockets.io).
Google Chrome and Safari are verified. Open http://outcold.2013.nodeknockout.com/, or one of the examples on jsfiddle http://jsfiddle.net/K5D4c/ or http://jsfiddle.net/Wh5q7/4/. Also you may try to open http://outcold.2013.nodeknockout.com/ with two browser tabs and see how instance updates work.
You also can take a look on source code, I did not have a time for the README.md file, but this is what you can find right now:
Voting is now closed.
Thank you for feedback! Yep, at the end I will try to make less resource-heavy.
CompliSpace Technology Pty Ltd
Did not implement yet 'members only' feature, but it will be on my agenda.
If there was a rating for customer service you should rate highly, good on you for following up with judges comments!
Why so low score? :( Not for the contest but let me know how it can be improved?
Edited; features in the ToDo list are good to add
Will do, thanks!