In the fine tradition of recent Washington rallies, Jon Stewart just estimated the crowd at 10 million people. He added that demographically and ethnically, the crowd exactly mirrors the population of the US — 74% white, 14% black, and the rest other.
[I'm conducting an experiment -- if we repeat the 10 million figure often enough, the media will reflexively run with it.]
UPDATE: Photos of good signs from the rally.
UPDATE 2: This has got to be the best “Rally to Restore Sanity” outside of DC — in Antarctica!