Sure, it's still in beta, but aren't all of Google's products? Responding to the needs of sustainable travelers and commuters everywhere, Google has added bike trail data, directions, and routes to their ever useful Google Maps web app.
So, if you're like us who've just invested in a pretty new road bike (I picked up a Bianchi hybrid for the bumpy roads in Bloomington, IN), this is great news.
Of course, since I'm currently situated in a small college town, we don't get the awesome immediacy that big cities will receive with this update - San Jose, Chicago, New York, and San Francisco - all of these cities have relatively accurate bike trails pulled into their systems and are up and running for your weekend biking plans.
Google is also asking all users of the new feature to provide constant feedback as to the suitability of roads for biking, since we all know potholes don't play too nicely with our hipster fixies and road bikes. Video of the service in action if you're too lazy to try it yourself: