@clacke By the way, the real application I was thinking of is purl.org - a persistent URL service run by the Internet Archive.
In my opinion, a vital piece of Internet infrastructure - but severely broken ... and closed-source??
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.