We have a new wiki. The migration is not 100% complete. You can help out by moving pages across. This wiki will exist for as long as there are pages left.
The official documentation has moved to http://docs.couchdb.org — The transition is not 100% complete, but http://docs.couchdb.org should be seen as having the latest info. In some cases, the wiki still has some more or older info on certain topics inside CouchDB.
General Tutorials and Overviews
Relaxed.tv — A collection of video tutorials and presentations
Using Views: Learn all about CouchDB's Map/Reduce views
Tutorials for Specific Languages