Found a few good quality videos that are meant to be used via Windows Vista Ultimate’s Dreamscene feature. You can download them from here. I’m trying to write this post while using the unbelievably dizzying clouds one. I’m officially almost sick–pretty cool though…sort of.

Update: Found a better one here. By better I mean one where the videos aren’t always moving. I.e., the POV is always static while things in the video move (like the ones that originally shipped with the Dreamscene feature). These tend to be much easier to have in the background.