It was quite simply the kind of press release ad sales executives love, the type that get forwarded from in-box to in-box rapidly. Toyota, hurt by the Japanese tragedies earlier this year, which slowed ad spending at least in local TV, indicated Thursday it's ready to spend liberally again. But, its shares were trading down 4.5% amid another rugged day on Wall Street. Other large advertisers such as Ford (7%) and Macy's (7%) fell notably, too. Yet, networks have nothing to worry about until at least New Year's.