Joomla To WordPress Migrator by Christian Gnoth has been tested with Joomla 1.5 and WordPress 2.9.2.
The migration requires a clean WordPress Installation, empty of posts, pages and categories.
This Plugin migrates all posts from Joomla to WordPress – including Tags, Catagorys and Links.
reads all categories from Joomla and creates them in WordPress
reads all posts from each category and inserts them in WordPress, including posts tags
changes most common links in post content to new WP Url
Plugin homepage: http://it-gnoth.de/projekte/wordpress/wordpress-plugins/