Commerce Product Entity Sync

This module is automatically synchronizes entities and it's (their's) fields to the commerce products.

For example, you have created Content Type for a Product and added there product_reference field that connects it to Commerce Product entity. The module will creates a new Commerce Product automatically, when new Product content (node) is created
and populate specified fields for a Commerce Product with values from Product node fields.

Alternatively, you can use a set of rules for this purpose, see http://drupal.org/node/971484 .