I just got back from Ignite Waterloo, a set of 5-minute talks on everything and anything "geek culture"(whatever that means). The variety of topics was excellent. We went from Steampunk monsters, to problems in Africa, to Craniometry, to homelessness, to tequila. The breadth of topics was great. Here's a full list. If you didn't like a topic, a new one was just 5 minutes away. It was a fantastic event, and I strongly encourage that everyone go to the next one (probably June-ish).
Also, they had a live twitter wall and a marshmallow sculpting contest. Awesome.