Magento 1.4 extension development

[JackITo]

Magento introduced a new concept of widget in magento 1.4 , my question is whether to write a magento extension in magento 1.4 is useful or not.

[davidkroj]

Magento Development is running in Ecommerce same point you can say to php application development because Magento is also based on PHP technology both are based on Zend Framework. I will recommend you one book: Magento 1.4 Development Cook book and the writer is Nurul Ferdous. there you will learn many feature of 1.4 magento extension.