JOHN LENNON TRIBUTE CONCERT DUE IN FALL A TNT all-star tribute is being planned for this fall in honor of John Lennon.  The cable network (with blessings from Yoko), is putting together a concert special at New York's Radio City Music Hall.  The event will be filmed and is expected to air on TNT on or near John's birthday, October 9.  No artists have yet been confirmed for the show, but a spokesperson for the network said the three remaining Beatles will be asked to participate.  Proceeds from the event will go to the Violence Policy Center, whose mission is to end gun violence by educating the public, the news media and policy makers about the public health costs of injuries and deaths from firearms. IK! was set to attend the concert on its original date of May 10, and we will hopefully still be able to attend when the postponed concert finally takes place - we understand, in the early fall.  One note about gun violence.  I heard a news story on ABC on Friday that gun sales are down significantly, which they are partially attributing to the recent school violence.