I’m part of three Facebook networks, and I’ve been keeping track of their size since May of this year.

Toronto has gone from 600k people in May to 800k people in September. That’s 32% of the municipality or 16% of the metropolitan area, which is an impressive proportion.

University of Toronto has been stable at 55k, but there should be a flurry of new users in September when first-year students get their UofT email addresses.

The population of IBMers on Facebook has actually declined. Conversely, I suspect our population on LinkedIn, a career-oriented networking site, has not.