This is good looking. But, is this just a River of News scrolling, or do you keep track of "read" items to get them out of the way?
The thread links use the CSS :visited selector to show the links in a different color to help identify the links you have previously clicked without the site knowing that information itself.
There is a history function for logged in members, but for user privacy it can be limited or disabled by the user via the Settings page and is also auto-purged periodically.
At the very least the site needs to show content that has been added since your last visit and that is something I plan to implement soon.
I plan to work on a solution, but if I do, users will be able to opt-in or opt-out depending on the implementation.