Yesterday, the Cake team launched a new application: cookbook (see also the announcement). It is thought to be the place for the manual of CakePHP 1.2 (and hence will replace http://tempdocs.cakephp.org when its content has been moved to the cookbook application). It is a kind of moderated wiki: you can edit the content, but those changes have to be approved before they go live.
One thing the team should improve is the speed of the application, it is really slow (and I don’t think it is my internet connection). My guess is that the menu structure slows down the application, maybe it can be cached?