Biked down, and even got my wife (not a cyclist) to bike down with me! Actually, she wanted to. It was great. We had sections of closed-off road all to ourselves, like around Dupont. We got up to the checkpoints, so did not go onto the mall, but rode our bikes around the glee-filled streets of downtown after the inauguration. Got some pics and vids. Will post at some point. Biking was definitely the way to go!