Although this plugin has been out there for over 1 month now, I didn't announce it in the plugins and hacks forums and thought this would still be a good idea. So here it is. :)
Plugin name: Newsletter Sign-Up
Plugin description: This plugin provides various ways to gain more subscribers to your mailinglist.
- Add a 'sign-up to our newsletter' checkbox to your comment or registration forms
- Add a sign-up form to your widget areas by using a widget, to your posts / pages by using a shortcode and to your template by calling a function.
- Works with most major newsletter providers, supports the YMLP and MailChimp API.
Demo: You can see some working examples at my blog: http://DannyvanKooten.com/
Let me know what you think!