peppolone

Plugin used to display the most recent topics of your phpBB forum(it works with phpbb 2.* and also phpbb 3.*) 
You can set the number of topics to display, wrap long words or exclude a category of the forum. 
<a href="http://www.4mj.it/wordpress-phpbb-last-topics-plugin/" title="Phpbb Last Topics" rel="nofollow ugc">Plugin Homepage</a>

WP-Phpbb Last Topics

Plugin used to display the most recent topics of your phpBB forum(it works with phpbb 2.* and also phpbb 3.*)

macmiller

The plugin is intended to create a number of links which you can display on your wordpress page. Each link represents a recent post to the phpBB forum. Clicking on a link will take you to the associated post within that topic on the phpBB forum. There are a number of parameters which indicates how many items should be returned and the length description.
The returned item will look like: 
* <code>POST TITLE(number of replies) in TOPIC TITLE on DATE TIME</code>

phpBB Topics Portal

A widget that accesses your phpBB forum and displays recent posts on your Wordpress page.

WP-Phpbb Last Topics vs phpBB Topics Portal