Jiki is a project that ran from '98 to '99.
It was a distributed component-based implementation of Wiki built under the auspices of the DistributedCoalition.
The source for the Jiki was used as a foundation for several other Java-based Wikis, including DevWiki. This means that, in some sense, the Jiki was a success.
Old site : http://www.jiki.org/