Rewrite rules para tener REST en PHP

Varias veces olvido los pasos necesarios para que funcione esa truculencia de apache:

• Make sure that an .htaccess override is allowed. In your httpd.conf, you should have a section that defines your Directory on the server. Make sure the AllowOverride is set to All for the correct DocumentRoot.
• Make sure you are editing the system httpd.conf rather than a user- or site-specific httpd.conf.
• Make sure you are loading up mod_rewrite correctly. You should see something like LoadModule rewrite_module libexec/httpd/mod_rewrite.so (Unix/Linux users should also see something like AddModule mod_rewrite.c) in your httpd.conf. Also make sure that those lines have not been commented out (by being prepended with a #). Restart Apache to make sure your conf settings are active.
• If you are installing into a user directory (http://example.com/~username), you'll need to modify the .htaccess file in the base directory of your installation. Just add the line "RewriteBase /~myusername/".

http://book.cakephp.org/view/37/Apache-and-mod_rewrite