From Mark Tucker of ThinkGenealogy comes this bit of information . . .
"In the last few years, wikis have become popular as a way for many people to collaborate and share information. Particularly interesting to the genealogy community are genealogy wikis. Two of the most well known are Dick Eastman’s Encyclopedia of Genealogy and FamilySearch’s Research Wiki.
There are three main uses for wiki’s in genealogy:
1) Articles about genealogy and family history (ex: Encyclopedia of Genealogy & FamilySearch Research Wiki)
2) Personal genealogy (ex: Genealogy Wikia, WeRelate)
3) Links to genealogy sites but no articles"