This build was among the last builds compiled before Longhorn finally entered Beta 1 stage. By this point, Microsoft had finally reimplemented the entire Longhorn feature set back into Longhorn itself (the sidebar is one notable exception), signifying the end of the Omega-13 stage.
Not only did this build include the new Aero Glass theme, but it also introduced the LDDM video drives, including updates to the Start Menu, and even a new Games Center.
