Need a little help with being housebound but want to help the community with minimal effort? Go get yourself an account on #OpenStreetMap if you haven't already, then go to http://osmose.openstreetmap.fr/ and set "Fixable" to Online. If what you get is overwhelming, uncheck categories that aren't interesting or you don't understand. Then just click "Fix-Edit" on the correct fix. When you're tired of doing that, click Save.