We Canadians often joke that Toronto believes it's the center of the Universe and until last week Toronto ruled Facebook's Universe as the largest geographic network on the social networking site, but London has taken over with more than 810,000 users compared to Toronto's 705,000. Facebook officials are not sure why London leaped past Toronto which, they say, is growing at the same rate as the site's worldwide user base. Interestingly enough, Canadian users make up over 10% of the site's user population with more than 11 million logins in June of '07. The Globe and Mail has more.