I just added a bunch of information about Ontario Festivals, and I thought I'd chime in here to say that while I take Marion's point about folk scenes in different parts of the country, I think there is a lot of usefulness in the listings, for a few reasons:
1) Having a listing of festivals would be interesting and useful, and there are a few places you can get a lot of that information quickly (like I just did with the Ontario festivals.
2) There are Canadian Mudcatters on here who are performers, and it might be of interest to other Canadian Mudcatters where they are going to be. There are also Mudcatters who organize events, and similarly I think it's nice to share the information about who's up to what.
3) People travel, and sometimes they want to know what's going on in another part of the country. People definitely travel long distances for festivals, but also, if I'm going to be in Vancouver for a week, I might like to know what's happening folk-wise while I'm there.
I say, let's try it and see if people find it useful or interesting.