Just did a little look on Amazon.ca to see (wasn't expecting anything, therefore not disappointed) if there was something to be found. Nothing (no surprise) from HP except for the same $799 Windows 7 tablet that I found on the Bestbuy.ca site. There was a Palm section, and was surprised to see 4 (different colors) Touchstone backs for the Pixi. I didn't even know there was a Canadian version of the Pixi.
Amazon.ca: Palm - Handhelds & PDAs / Computers & Accessories: Electronics