MEMPHIS, Tenn. (AP) - Elvis impersonators can continue swiveling their hips and quivering their lips, after Graceland reversed its earlier decision to sever its support of festivals featuring clones of the King. Elvis Presley (news) Enterprises, the business arm of the multi-million-dollar Presley estate, decided in October to no longer associate with festivals using Elvis impersonators. But the estate gave back its backing after receiving about 30 letters from festival organizers and fans who were all shook up. "From reading these, we said, 'Let's forget about the hassles. This is something, frankly, we need to support,'" said Jack Soden, chief...