Remi Corson

Add Mailchimp signup process to WordPress registration form
<a href="http://remicorson.com" rel="nofollow ugc">Developer Website</a> – <a href="http://remicorson.com/easy-wordpress-mailchimp-integration/" rel="nofollow ugc">Plugin Page</a>

Easy WordPress Mailchimp Integration

Requires at least 3.0 Tested up to 3.3.1 Stable tag: 1.0 Add Mailchimp signup process to WordPress registration form

Rafal Toborek

This plugin is currently in alpha stage. It includes only basic features like sending e-mail notifications using built-in PHP mail() function or by using external SMTP server (recommended). Work of this plugin depends mostly on the SMTP server configuration.
Lemme Know plugin allows you to send e-mail notifications only for a small amount of subscribers. There are plans to implement Cron-based solution which will allows to send notifications in chunks and omit server limitations.

Lemme Know

Sends e-mail notification for all subscribers when a new post is published.

Easy WordPress Mailchimp Integration vs Lemme Know