The Department of Transportation has made the 2009 Bike map available. You can download it here: http://www.nyc.gov/html/dot/html/bicyclists/bikemaps.shtml or pick it up at any bike shop. Remember your helmet and enjoy the breeze!
If you are a driver or need a ride, remember to use http://cunylaw.erideshare.com/ to offer or request rides. The group password is 'whereareyou' .