Anime North is a convention in Toronto Ontario close to 15, 000 people have attended these past few years. It's about 13 years old and probably the biggest anime convention in Canada (as far as I know). I unfortunately can not go it,s just to far away for me but you should tell me your opinion of it when you get back I might go in 2010.
BTW for those who care it's held from the 22nd of may to the 24th of may this year at the Toronto congress center.
More info on Anime North:
http://www.animenorth.com/joomla15/
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