Sony Ericsson today announced two new Walkman series phones, the W880 and W610. These come after the success of the W810 model. The W880 is 9.4mm thin and the W610 is 14mm thin. They both have Bluetooth 2.0, Memory Stick Micro (M2) slot, 2 mega pixel camera and the Walkman player 2.0. The price for both these models hasn't been released yet.