From the January 6, 2012 Innovators Insight Newsletter:
"Rep. Darrell Issa (R-Calif.) and Sen. Ron Wyden (D-Ore.) have unveiled Madison, a live legislative markup tool that accepts online feedback on bills as they move through the legislative process. Released in conjunction with an upcoming bill, the tool allows users with perhaps more expertise in a given area to propose revisions a particular bill, and leave comments to justify the changes."