Somewhat related, the recently launched Bay Area Bike Share system has a not-too-well-publicized API at <a href="http://bayareabikeshare.com/stations/json" rel="nofollow">http://bayareabikeshare.com/stations/json</a>
Re. the implementation of weather prediction: the api that powers the dark sky iphone app is free for >1000 requests a day: <a href="https://developer.forecast.io/" rel="nofollow">https://developer.forecast.io/</a> -in sf this kind of data is doubly useful too (weather that changes quickly)
The project is very cool. But for the life of me, I don't understand the "taking my phone out and checking is too inconvenient/time consuming" mentality. I stopped wearing a wristwatch, b/c I could just look at my phone, heck, I've shed as much stuff as possible since it can all go on the phone. Then out comes the pebble, and other "smart" watches. Seriously, I just don't get it. Isn't there a point beyond which such things just become frivolous?