Vista Build 5231
Details on a new build of Windows Vista (Formerly Windows Code-Named "Longhorn") have leaked this morning, along with screenshots showing the new build. The build carries the build string 5231.winmain.050912-2020.
Some of the known new nicities in the build include the new WMP11 in its primitive form, Some new IE7 features (including the tab previews), and new sound settings. (Read More for information on some other new features in this build).
The build has leaked to certain individuals but is yet to publicly leak.