WordPress publish

This module lets you publish contents directly on your WordPress blog. Using this module, you can configure and publish a node immediately after it has been published on your Drupal site. You don't have to press any link to share your content to your blog. This module also offers options to share the content on per node basis as well as on per content type basis. You can add as many as wordpress blog sites to post the content to. The log in credential can be stored securely or it can be provided on each content post.

You can download the module from http://drupal.org/project/wp_publish