Chimpsterous adds a newsletter page to your Posterous site. When users click on the Newsletter link, they will be brought to your embedded signup form. Chimpsterous creates the new subscribe form page on your primary Posterous Site. You can find out more here or read the blog post.
Setting Up Chimpsterous
- Go to Account > API Key & Authorized Apps and copy your API Key.

- Head over to Chimpsterous and click the Get Started button.

- Paste the code into the Your MailChimp API Key field.

- Select the list that you'd like to use.

- In this window, log into Posterous and click Publish.

- Once you're done, you should see a Published! message.

- Now, when you go to your Posterous site, you'll see a Newsletter link on your page.
