Sony has released the full spec of the 'X' series OLED walkman.
It will play MP3, WMA and AAC files (up to 320kbps). It supports videos in formats MPEG4, H.264 and WAV. Interestingly the screen itself is 432x240, but the video formats will only support 320x240. That's strange.
The player also has an FM radio, Wi-Fi (802.11g/b). Sony claims 33 hours of music playing and 9 hours of video watching.
We're still waiting for a US release or price (in the UK it will be released soon, costing 216GB for the 16GB version).