http://www.eweek.com/article2/0,1759,1617825,00.asp
By open-sourcing its next-generation Linux desktop technology, Sun Microsystems Inc. is turning over some of its most innovative work to date to the open-source community, sources said.

Officials at the Santa Clara, Calif., systems maker said at JavaOne here that Sun plans to turn its next-generation Linux desktop, Project Looking Glass, over to the open-source community. The open sourcing of its Looking Glass technology represents a significant move by Sun, which has been under pressure by the open-source community to "open" some of its technology, specifically Java itself.
Here's a nice slide show on eweek's site, and here's the official project's site.