While surfing around on the internet, we located something quite unusual. Buried within several technical videos (can someone say Ben Stein boring?) was a Windows Vista build of 6429.fbl_multimedia_media.070514-1730. We won't bother speculating as to what this build represents, but word is spreading that this could be an early developmental build of Windows "7" (or a dogfood SP2 build). A UAC prompt within the Local Training demo shows the build as being a WEX build.
The demos themselves deal with audio fidelity testing. They're definitely worth a watch if you happen to have the necessary tools and want to test the sound coming from your computer (to prove that Creative makes terrible drivers, for example).