We don't say eh! At least, no more than anybody else in the world. It's a common term everywhere, and I'm not sure why it's associated with us.
And you guys in the Northern States are pretty good neighbours (note the superior spelling of neighbour). Lots of cultural ties and stuff, but we can't help but find you all slightly strange
It really is, but I guess it's the Canadian Dialect that really emphasizes it.
...funny, I have this "ou dyslexia" all my life--well it's a dyslexia here, I'd be great elsewhere--and "neighbor" is one of the few words I don't "ou," though I "ou" words that aren't supposed to be "ou" either...
And yes, great neighbors, and we both find each other strange. I'm saddened to say that the only place I've been to is Nelson / Ainsworth Hotsprings...wouldn't mind going to Edmonton for mall reasons...really, REALLY wanted to go to the Vancouver games and watch some curling.
...if I had money and could find my passport, I'd probably go somewhere...get lost...and probably cross a moose and not survive...