This is the second concept shot, and in my opinion, far more interesting than the first. Details on the overall layout, theme, header and footer are described in the first concept and the details describing the buttons on the user toolbar are written in the second concept.
One Page Fits All This concept is based on $spyed's Message Center Mockup - where all message types can be accessed down the left hand side. When one of theses is selected, the main contents change. If an item has multiple sub-items (such as for notes, where there will be subfolders like Inbox, Sent and custom folders, plus the option to compose a new note), these will expand when the item is clicked.
'Feeds' in dAv6 will be more prominent, whether they're accessed directly in RSS or via some similar system, and should be available for News, Galleries and Forum threads among others.
Anything you see in the central section can be dragged by its border in order to put it in a folder (at the bottom of the left hand panel), or by clicking the downwards-pointing arrow, choose an option to move it to a folder. I don't see why there should be any limitation on the types of items you can put in message folders either. Notes, comments and deviations could all sit side-by-side. And why not make them different colours? And put folders inside folders? Anything is possible!
On the right is the widget bar. I think the word 'widget' is rather overused in this web-2.0 world, so if the creators can think of a more imaginative word to use instead, then I welcome that. The types of widgets on display are pretty self-explanatory. This bar can be collapsed if you want more space for the main message pane. Messages, deviations or notes of the current type can be filtered by using the Find box in the upper-right corner of the header.
With regards to comments themselves, you might have noticed that sometimes when you (if you're a subscriber) have a comment, you may miss the fact that someone has posted a reply to the comment (either someone else, or the same person as a follow-up comment) and there's no way to know that without going to the comment page. Stating that the comment has had a follow-up reply will help facilitate the nested comment system.
The idea behind this for the message center sounds like a very nice one, I hope they add change the center to look like this, since it looks easier to manage in my opinion.
Thanks. I still prefer this myself over the one we have at the moment. It just looks clearer, as well as having more features. I virtually never look at the left hand side of the message center any more because they took the counters (next to each message type) away and thus they look the same whether they're empty or not.