I guess this makes three Orkut toolbars available (the previous ones mentioned here and here).
What makes this one distinct from previous versions is that it has a built in chat client inside of the toolbar (which is fun for the first five minuets--until you realize you are the only one on).
It also comes with a radio player, which may help pass the time while you are on Orkut.
You can dowload this new Orkut Toolbar over here. Firefox users may have some difficulty installing this toolbar, but you should be able to get this program up and running (simply follow the instructions on the site).