Embarrassingly, square.ca is rather... bare at the time of posting.
I am super excited for this, though. I have a number of friends who sell artwork at various outdoor fairs, and I've inundated them with tales of how much easier theirs lives would be if they could get a credit card reader for their phone. It really reduces the friction involved in trying to make what is essentially a several hundred dollar impulse purchase.
edit: Is it just me, or are all the thinks in the press release broken? squareup.ca, square.ca, squareup.com/ca/ca/fr, none of these work.