This isn't new by any means but I recently stumbled upon it again, and was pleased to see it seems pretty well updated, listing all FM, AM and other frequencies in cities around the world. It appears to also include all currently available HD signals and I was surprised by how relatively few there are in Buffalo.
As a bonus, it also lists where their transmitters are located, along with some stations we can't get here. And there are even listings for weather outlets you'll need a special receiver to hear.
Check out the list and others below:
Toronto
Buffalo
World Radio Map Home Page