No posts in the Canadian area since 2012.....
As far as the Black Series goes we have managed to find the 6" figures at regular retail up to and including the 3rd wave - with Boba Fett and the Stormtrooper being the (ridiculously) hard to find figures. Without doing much research I can only imagine this is similar to what is happening Stateside.
3.75" line is a similar story with all figures up to #19 Mace Windu being found at regular retail - we've even had a few updated #12 Clonetroopers find their way to our pegs. No sightings of the ESB wave up here yet, which I believe has shown up in certain places in the US.