Google is really beefing up their Maps service. The recent addition of layars which added Buzz is not the end of Google adding features to this extremely popular online Map.
Now there are biking directions included in Google Maps. When you select biking directions the look of the Map changes and highlight roads/streets without vehicles, with bike lines, and other streets recommended for cyclists. There's also a Layar that gives you all recommended bike routes. So far this feature hasn't appear on Android yet but it should become available shortly.