Hillary Clinton announced online on Saturday that she's putting together a Presidential Exploratory Committee -- only a few days after Barack Obama made a similar online announcement. Both senators seem to have read the Time magazine person-of-the-year issue and think "you" -- your voice and technology -- will play important roles in '08. (For what it may be symbolically worth: Obama's announcement was embeddable from his Web site; Clinton's was not.) "I have a feeling it's going to be very interesting," Clinton says. Could be.