This includes the DMP-M700 (1GB) and DMP-M600 (512MB) which you can see on the photo. The 700 will be available in two colours and the 600 will be available in five different colors. They measure 15.6 x 87 x 15.6 mm and weigh only 23g.
The battery life is 10 hours.
Then there's also the HDP-M3000 which has a 6GB HDD and FM tuner. It measures 51.7x89.2x19.5mm, weighs 87g and has a battery life of 12h.