Even as word that Android devices have outsold the iPhone in the U.S. is still bouncing around the Web, Google gave college students, couriers, and exercise enthusiasts another reason to side with it this afternoon, adding biking directions (along with a couple other tweaks) to Google Maps 4.2 for Android. The biking directions should prove to be a natural fit, given that people who are riding around on a bike all day may not have easy access to a PC.