I think part of the reason Skype hasn't done Skype In for Canada is due to some of the requirements the CRTC puts on telecoms here (there's some rigmarole to do with 911 and municipal taxes). I'm guessing the regulatory hassles aren't quite worth it yet for them.

It is too bad they don't have it though. I would have preferred Skype In over Vonage when I was looking for a home phone a few years ago.