SL residents can look for some big changes in the upcoming UI aka SL viewer. Some of them are good and some of them not. I let you decide. Tateru Nino wrote a great article about it along with some nice screenshots. You know you want a peek so go ahead and look here : Second Life 2.0: A sneak peek at the new user-interface
Update: Now we have an "official" response from Howard Linden here.