Gwoo announced today Cake Sheet, a reference of the core functionality of CakePHP. As long as the Cake Sheet is not available in the place mentioned in the announcement, you can download it directly from the repository. You can download the Cake Sheet from http://cakephp.org/files/Resources/CakePHP-1.2-Cheatsheet.pdf.
Update 2009-12-07: Fixing url.
Error: The requested address ‘/files/cakesheet.pdf’ was not found on this server.
@ck: Thanks for the hint, the link is now fixed.