Zapier: Workflow Automation

Zapier is awesome!! It makes me feel like I'm a cool programmer that can make anything happen between my apps.
We use Zapier to connect Shopify to:
1) Mailchimp, adding customers to our maillist (the original mailchimp app unsubscribes returning customers).
2) Mandrill, creating a follow up mail 5 days after an order is fulfilled (dont want to follow up if we havent sent the order).