That’s it. I’m going to work on an lightweight AJAX version using Jquery shortly.

I managed to get this working in Revolution. I’ve removed the need for the username&password and now only require an API key. So, starting from Garry’s snippet, do the following:

EDIT: Forgot to mention you need to update the API to 1.3 - I just added this at point 2.

1) Find your Mailchimp API key in Mailchimp by going to Account (very top left) -> API Keys & Info (bottom). The key will look something like 45g7453redf3b26r019d230a543e84fg-us2

2) Download the latest Mailchimp PHP API (as of this post, 1.3) - http://www.mailchimp.com/api/downloads/#php. Replace the API in classes/MCAPI.class.php with the one you just downloaded.

3) Erase everything in config.inc.php and replace with:

<?php
$apikey = 'YOUR MAILCHIMP APIKEY';

4) In the snippet code (subscribe.snippet.php), go to line 20 and replace

$api = new MCAPI($username, $password);

with

$api = new MCAPI($apikey);

5) Replace the chunk (subscribe.form.tpl), with the following. It changes the evo tags to revo and swaps mc_FIRST/mc_LAST with mc_FNAME and mc_LNAME (what MC will expect):

<p>[[+MailChimp.message]]</p>
<form method="post" action="[[~[[*id]]]]">
	<label>First Name: <input type="text" name="mc_FNAME" value="" /></label><br />
	<label>Last Name: <input type="text" name="mc_LNAME" value="" /></label><br />
	<label>Email: <input type="text" name="mc_EMAIL" value="" /></label>
	<input type="submit" name="subscribe" value="Subscribe" />
</form>

5) Snippet call becomes: (evo->revo)

[[!mailchimpSubscribe?form=`mailchimpForm` &listId=`<YOUR LIST ID>`]]

That’s it. I’m going to work on an lightweight AJAX version using Jquery shortly.