On Wednesday Google's Lat Long Blog posted that Google has released new data that shows more multi use paths and that they will soon be providing bike directions. This is the first public announcement from Google that a bike routing feature is in the works.
"...The best part about this new dataset is that we've been able to add a lot of new, detailed information to Google Maps - information that helps people better explore and get around the real world. For example, college students will be pleased to see maps of many campuses; and cyclists will now find many more trails and paths to explore. Soon we even plan on providing you with biking directions to take advantage of this new data. Of course, in the true Google spirit of 'launch and iterate,' we plan to work with more data sources to add new features in the map."