PHP Tips and Tricks

We are going to use in our huge auction project Magento Commerce Community edition.
http://www.magentocommerce.com/
Also decided to use ExtJs as user interface rendering engine.
http://www.extjs.com/
To work on server side objects without touching javascript code we decided to use PHP-Ext adapter.
http://php-ext.quimera-solutions.com/
Soon will drop about details. May be will publish Magento module as well.