There is no read/unread View. Please look at the Subscribe functionality below.
The Recent View is a list of all threads sorted by the most recent reply
The Votes View is simple. Just the most voted up threads in descending order.
The My Activity View are the threads you have posted in and are sorted by your most recent posts
The My Subscriptions View (which will be released soon) will show you all threads that you subscribed to and want to follow. This view will be sorted by most recent reply. You will also get an email regarding the threads you subscribe to. Anytime you reply to a thread, it will auto-subscribe you.
When you change any of the SEARCH criteria above (categories, types etc.) it will filter based on the View you are on.
We anticipate having additional Views and look forward to the feedback.