As the title says, any suggestions? We're going to be visiting NYC, DC and Toronto soon and so any suggestions would be appreciated. I'm sure there are local transport apps i.e. subway etc but I don't know which ones to go for. I prefer pay apps over add supported ones. P.S. I was going to post in the iPhone Apps sub forum but it looks like it's mainly used by developers to pimp out their apps to everyone rather than a place to ask for help.