Helen of Troy was the Greek woman whose allure, it was said, "launched a thousand ships." Arianna Huffington is the Greek woman whose invitation, we know, launched a hundred buses. Even though she's backing Jon Stewart's "Rally to Restore Sanity," and even though I now work for her, I had dismissed the event this Saturday on the Mall as self-indulgent, time-wasting comedy. Until now. The reason is that I watched two videos: one, of a thug named Tim Profitt pressing his shoe onto Lauren Valle's skull; the other, of Joy Behar calling Sharron Angle a bitch who's going to hell. That was enough.