Hope all is well.
Would it be possible for you to share with us if Canada Post integration is something the team is working on? As you can imagine more and more stores are going online and the biggest issue I, and I think I speak for all Canadian developers, face is that there is no real way to calculate shipping costs.
I have recently be playing around with Shopify Lite and the 'button' to take people out of Squarespace and let Shopify handle, and collect payments, but that is not ideal.
Any updates would be greatly appreciated.
PS: I will also send this to your email address in case you do not follow these posts.