|I'm not seeing the customer data on MailChimp!|
Even though MailChimp For Magento doesn't create the merge fields automatically yet, the customer information is being sent correctly.
You can see it there after creating the correspondent Merge Fields for the information at MailChimp -> Select the list -> Settings -> List fields and *|MERGE|* tags
Please check the the following image to see how the Merge Fields should be created:
Merge Fields to show customer Information