Here is the lay-out of the new twitter: On the left side of the screen, retweets, @mentions, searches, and lists are being positioned side by side just above the timeline. The list of your followers, persons or entities that you are following, your favorite tweets, trending topics,people/entities suggested for you to follow are being placed on the right side of the screen.
Direct messages are now being accessed through the tab link at the topmost part of the screen, alongside home and profile tabs. The search form is now also at the top.The copyright information, privacy policy and other footer-related links are being placed at the bottom of the right pane.
One of the cool features of the new twitter is the display of the details pane when a tweet is clicked. It displays tweets, replies and retweets in relation to the tweet that was clicked. This pane also provides an enlarged format of the tweeet-- good for those who are still not comfortable reading tweets from the timeline.
Embedding photos and videos directly on twitter became easy as partnerships with photo and video distribution entities were made. The video or photo can be viewed or previewed right in the details pane.
Another good feature of the new twitter is the preview of a tweep's profile, account info, bio and his recent tweets when a tweep's username is clicked.
The twitter team claimed that the new twitter provides an easier, faster and richer experience... and I can't help but to agree. :)