It looks like Ringo, which is a popular social network, has decided to end its service. Here is part of the email I received 2 hours ago.
Dear Ringo member, After much consideration we have decided to end the Ringo service. As of June 30, 2008 the Ringo service is ending and you will no longer have access to your Ringo account.
Twitter is faster at getting updated with news like this. A search through google won't reveal any news of this since it is only 2 or so hours old, however, a search through twitter got quite a lot of results. http://twittier.com/?q=ringo
The originating server of the email seems to check out. It originates from the tickle.com which is authoritative for ringo's mail transfer. (I consider all email guilty until proven innocent)
Is this the first death of a social network? I believe so, at least a major one.
It appears ringo.com hasn't been growing at all for the past year, if not slowly dying.