Official announcement from Stage6:

Stage6.com has been shut down. Thank you for supporting the service.

We created Stage6 with the mission of empowering content creators and viewers to discover a new kind of video experience. Ultimately, the continued operation of Stage6 was a very expensive enterprise that required an enormous amount of attention and resources that we at DivX are not in a position to continue to provide. There are a lot of other details involved, but at the end of the day it's really as simple as that.

The DivX experience will continue, of course. Every day new DivX Certified devices arrive on the market making it easy to move video beyond the PC. Products powered by DivX Connected, our new initiative that lets users stream video, photos, music and Internet services from the PC to the TV, are hitting retail outlets. We remain committed to empowering content creators to deliver high quality video to a wide audience, and we'll continue to offer services that will make it easy to find videos online in the DivX format.

It's been a wild ride, and none of it would have been possible without the support of our users. Thank you for making Stage6 everything that it was.
The site was actually closed down on February 28, 2008, but I thought I would post the news here in case anyone didn't know. When i first heard the news I thought it was going to be due to some form of legal action against the company for copyright infringement contained in some of the videos held on Stage6, but from this announcement and the blogs written by the DivX staff who ran the site it was purely a money thing. You just can't continue providing such an intensive video streaming site and trying to self fund it forever.

A real shame as Stage6 DivX videos were some of the highest quality streaming videos available online. Really showed how bad the quality of youtube video is. Although Stage6 are recommending a site called http://www.veoh.com/ which also used DivX video and this looks like a promising alternative.