Actually we have one more feature ready today.
Cart Note Attributes - We have just added support for Cart Note Attributes. These are very useful for adding additional information to an order that doesn't quite fit in to the order notes or something that you want to place in another area of an email template. For example you want to show delivery instructions within your email template, You can simple add a Note Attribute called delivery_instructions and include it in your template with the following liquid.
{{note_attributes.delivery_instructions}}
Thanks,
Ryan