Version:1.0 This wordpress plugin gives users the option to subscribe to your PHPList newsletter when adding comments to your blog
Pre-requisites Wordpress 2.0.x or greater Phplist 2.10.2 or greater. (Download at http://www.phplist.com) PHP 4.x or 5.x with cURL support
Quick Start Instructions 1. Download plugin installation and upload phplist-comment-subscriber.php to your plug-ins folder, usually /wp-content/plugins 2. Login to wordpress administration panel and activate the plug-in (Under plug-ins). Plugin name is phplist comments. 3. Navigate to Options -> PHPList and fill in the General Settings and Form configuration as instructed.
Detailed instructions available here