Listening to CBC Radio (Toronto) at work (ironically in Redmond, not Toronto) and an interview mentioned two neat sites.
TTC Rider has lots (and lots) of useful information about the subway system, such as which car to get on so that you get off right at the escalator ;-).
The second is the not-quite-launched WashroomQuest.com, which aims to list all public and sorta-public washrooms. For people who walk, rollerblade, or bike anywhere – you know, instead of driving from one indoor location to another – this is badly needed in every city.