As America recovers from the events of Sept. 11, founding Beatle John Lennon's words and music are both a soothing balm and a call to action for us all. His musical urging to "come together" takes on a particular significance just now. "John would have been just as angry as we are," offers his widow, Yoko Ono. "But he was also a wise person, and he would have known that we can't just act on our anger."The legend's work will be celebrated in an ambitious tribute concert tonight at Madison Square Garden. The concert whose artists include Dave Matthews, Marc Anthony, Lou Reed, Alanis Morissette, Moby and Stone Temple Pilots will be telecast live on TNT and the WB at 8 pm. Originally planned as a fundraiser for agencies that promote peace, organizers widened the scope of beneficiaries to include several New York City relief organizations. As a producer of the tribute, Ono sat down with TV Guide Online (prior to Sept. 11) to share her feelings about the concert's significance.