Where to find good concerts in Toronto

When looking up concert listings, I usually check a few places:
First, I'll check Rotate This. They have tickets that cover a wide range of events, but don't expect to find the Madonna concert there. Listings are in chronological order.

I also check Soundscapes. Their listings are by artist name, so that's helpful.

A while ago I came across a site that aggregated a bunch of Toronto concert listings, but I can't seem to find the link anywhere, and web searches have been fruitless.

Of course if you really want those Madonna tickets, you can always check with the evil empire.