During the summer we blogged about the nice maps by Cloudmade that make up the background for Ride the City (here's that blog post). Since then, Cloudmade has developed a great new mapping tool to make for easier mapping. It's called Mapzen: a tool by Cloudmade that helps anyone contribute to the free & volunteer effort to map the whole planet, including your street and favorite places. To access Mapzen, you need an Open Street Map user account, then simply log on and edit the map. Here's a screen shot from Hunts Point, Bronx, where I used to work.