I am currently living in Toronto, Canada.
In the past, I have dehydrated a Toronto-based sourdough starter (which I believe, when dehydrated in the right way can preserve the yeast), and sent them to friends around the globe in hopes of collecting versions of thier local yeasts as well (for which I received none).
I would love to take this idea and share it with the people in this forum. If people are interested in trading a dried version of thier own local yeast, I would be happy to mail some local Toronto sourdough yeast in exchange.
Perhaps somethign like this already exists. If so, I would love to know where I can go to get involved with it!