As stated in our review of Symphony b1p1 , interest in that OS is growing expediently and is now evidenced by its site going offline.
http://www.symphonyos.com/  has gone offline and now leads to a sparse page stating, "We are currently experiencing a very high amount of web traffic. The website has been disabled. If you are looking for the Beta 1 PR 1 ISO download please follow one of the links below."
As stated, the links to download your copy of Symphony OS Beta 1 preview 1 are still available. If support is needed, "while the forums are closed the IRC channel is open. Join us on irc.freenode.net in #symphonyos "