Here's a product we can create together (if it doesn't already exist): A cyclists' map of the United States (and, while we're at it, everywhere else.) Every biker knows the good cycling roads near home, but requires help and advice elsewhere. What if everyone fed a giant database with info on the roads they know--charming, passable, dangerous, etc. Then some enterprising cyclist geeks could attach this data to maps. In the end, bikers could punch in a starting point and a destination, and ask for a route, say, with maximum charm and nothing more than moderate hills.
Isn't this an open-source opportunity? Is anyone already doing it?