One of the most useful apps I have found for my BlackBerry has to be RailBandit. I frequently take the train from New Jersey into New York City, so having the live schedules right on my device have made life so much easier. I got word today that RailBandit has added an NYC Subway app to their lineup. The new application allows you to find the fastest route between any two subway stations taking into account the current schedules. It will show you departure and arrival times as well as any wait time. There is also a map to help you locate the nearest station and it stores your trips as favorites. The best part is that the app works offline so you don't have to worry about having data coverage when you're underground. NYC Subway sells for $5.95 in the CrackBerry App Store and has a 5 day free trial.