If you couldn't attend the public meetings, but you have a lot to say about improving bicycling in Philadelphia then consider using Community Walk. Community Walk is a mapping tool set up to help the planners receive public input on phase 2 of the Philadelphia Pedestrian and Bicycle plan.
Open up the map - http://www.communitywalk.com/WalkBikePhilly
Username - WalkBikePhilly
Password - WalkBikePhilly
(Username and Password are case sensitive)
or login with your own account
Once logged in you can then start adding markers, if you know a little html you can then insert photos or Google Street View into your marker's information box.
Click on image to enlarge