Hey, Ryan Quinn here from SymphonyOS. We were dormant from our 2008.1 release until a couple months ago when we started on a new codebase. The 2008.1 release does not use a full HTML interface but earlier releases do, though they are based on a very old version of Firefox. We will be releasing a pre-alpha of Symphony Strata which will feature a brand new HTML5 based desktop environment designed for both local and remote use. Unfortunately for quite a while our forums were not working properly (holding posts for moderation and not notifying me of those posts. We didnt want to pre-moderate any comments and posts should show up properly now). Right now the community remains quiet awaiting the pre-alpha release but I have now committed to at least two blog updates per week with notifications via facebook and twitter.
Symphony very seldom releases anything that is not given a pre-alpha, alpha, or beta label. The reason for this is that the environment is ever evolving and we do not do code freezes for longer than it takes to get a release out the door. The current Symphony Strata release is the first in our 3.x series of releases with 2008.1 being the only member of the 2.x series and 1.x series releases dating back to May, 2005. We are not a dead project, just a small community who currently has our heads buried in the code pushing towards a new release.