Love the simple interface. I have been giving a site like this thought for the past six months. I like that you haven't focused on "is it on schedule" but more "how long am I going to wait" I would love a distribution of the space between busses and trains at specific stops. For example, for the N line, at Cole & Carl, show me the frequency distribution of time between trains (and include an indication of what it's supposed to be). When three appear all within 5 minutes, I know someone is in for a very long wait.