Whatever the subject, there's someone out there spending a lot of time thinking about it, talking about it and writing about it.
Problem is, they can be hard to find.
And the more obscure the topic, the more difficult it gets. The first and still one of the best expert finders on the Net. You can also scan the site's database to find an expert on your own. Consider this a Canada-specific version of ProfNet. Another Canadian site offering a database of Canuck experts from business to government to academe.