I'm pretty late to the whole smart phone revolution.  But when I first got my fancy mobile device (oh, it's so much more than a phone friends) I blogged about TriMet's mobile app center.  Secretly I also longed for an app that would give me turn-by-turn directions...on my bike!  Well, that hasn't happened quite yet but in my search for real-time bicycling directions, I found Bike Map - by Maplets app.

Screen shots from the Bike Map - by Maplets app

This app takes the maps produced by esteemed public agencies such as PBOT, digitizes them, lines them up with GPS data, and makes them look good on a 2.5 inch screen.  While we've had our map available on-line as a pdf for a while, that format just didn't lend itself to tiny screens very well.  Bike Map app has all of the bicycling and neighborhood walking and biking maps that PBOT produces.  It also has maps for many other cities across the U.S. 

This is just one app for the iPhone (and iPad) that I've found.  Have you found others for iPhone or Android?  What are the latest transportation apps in general that you are using?