a list of new stuff in the just released version 1.2 is available in the release announcement: http://tobias.baethge.com/2009/05/wp-table-reloaded-12-now-available/
This plugin enables you to create and manage tables in the admin-area of WordPress. You can then show them in your posts, on your pages or in text widgets by using a shortcode.
That way you won't have to bother with HTML in your editor.
A full list of features, screenshots and more information is available on the plugin website at http://tobias.baethge.com/wordpress-plugins/wp-table-reloaded-english/ or on the plugin's page in the WP Plugin Directory (http://wordpress.org/extend/plugins/wp-table-reloaded/).
I'd be happy about reviews and suggestions. Thanks!