Atheists seem to have a thing for buses. We recently wrote about the bus ads in London which proclaimed, "There's probably no God. Now stop worrying and enjoy your life." Along these same lines, Washington, D.C., is now getting its own atheist bus campaign, headlined, "Why believe in a god? Just be good for goodness' sake." The advertiser is the American Humanist Association, which is putting $40,000 into the holiday campaign. An AHA rep says the group is running the ads now because "there are an awful lot of agnostics, atheists and other types of non-theists who feel a little alone during the holidays because of its association with traditional religion."