This team is currently compiling the help screens for Joomla 2.5 and Joomla! 3.0. These are being served from this wiki and you can see a summary page showing the current status of each page. Summaries for 2.5 Help screens are here and 3.0 Help screens are here.
The aim of the API Reference Project is to construct a useful reference manual on the Joomla 1.5 (and later) Framework API which will complement, rather than replace, the automatically generated material on http://api.joomla.org. The starting point for the API Reference is the Framework page which lists all of the classes in the Framework API.]]