Google Map Maker has come to the US. Instead of just reporting an error, you can now go in and make changes yourself. All edits will be reviewed for accuracy before being committed to the publicly available map. The information posted today talks about POIs, bike lanes and the like, but it appears that you can edit/add streets and addresses as well. Eventually, this should improve Google Maps Navigation, which definitely needs it! Check out the video promo below and then have at it my cartographic friends!