Ubuntu Karmic Koala 9.10 Beta was released today and includes the previously mentioned:
-Updated Human GDM theme, Humanity icons and new log-out screen
-New wallpapers and GDM theme - The gdm 2.28 login manager is a complete rewrite compared to the version in earlier Ubuntu releases, permitting a more integrated login experience.
-The renamed Ubuntu Software Center (previously: Ubuntu Software Store).
Other than that, Ubuntu Karmic Koala beta comes with