In version 1.0 we added a new way of adding simple products to configurable products. The new method is a quick and easy way of creating new simple products with only minimal data entry.
We have created a video that demonstrates this and which can be seen here.
(Of course you can always use Magento’s import product tool to enter the simple products and then associate them to a configurable product with a few clicks.)
We hope you enjoy this new feature.