SanDisk is finally upgrading its core MP3 player line, a leak this evening showed. The Sansa Fuze+ should replace the 2.5 year old original with a fresher design that uses capacitive touch buttons and a color OLED display. It would address some longstanding complaints with support for AAC and H.264, although Engadget's spec notes SanDisk is keeping the largely unused slotRadio format an option for its microSDHC slot.