With the recent addition of a fantastic volume render to yt, people have been creating some amazing visualizations. To showcase some of the wonderful movies that yt users are making, we've set up video gallery here: http://yt.enzotools.org/video_gallery.html
Made something great of your own? Submitting it to the gallery is easy. First, get a free account on vimeo.com. Free accounts will allow you to upload 500 Mb per week. Next, join the yt group on vimeo.com: http://vimeo.com/groups/34915
When you upload your video and add it to the yt group, it will automatically be added to the yt video gallery. And that's it!
We look forward to seeing what everyone is up to!
Britton Smith, on behalf of the yt hive-mind.