On my regular daily commute yesterday I saw no more cyclists than usual, but throughout the day we spotted them on the busy street behind our shop.
Commuting once is much more of a project than commuting all the time. I have systems in place to help me streamline my daily load. Riding a long route, I want to use cycling shoes and I don't want to lug walking shoes, so I keep a pair of shop shoes at work. I can also leave some clothing there so I don't have to carry the complete change every day.
When I rode shorter routes in an urban setting I could ride in normal clothes, but I still liked the acceleration of cleated shoes in traffic. Keeping work shoes at work left more room in my commuting bag for lunch.
It's nice to have our own holiday now, even if it's mostly a token gesture. Also, with bicycling getting so much publicity, drivers seem to react more cooperatively, at least for now.