About a week and a half ago I passed on a link from londres to some BU videos. Most of you already have them, but a few people missed out because the link expired. I finally made a new one, so PM me if you want it.
The most recognizable element in a Canadian accent is pronouncing words that Americans put an "ow" sound in, like "house" with an "oo" sound instead - "hoose." That's sort of oversimplified, because there's a Scottish inflection to it that keeps it from being a straight "oo" sound.