We already knew a bunch about the S Series, but Sony has now confirmed the 2.4-inch (QVGA) LCD player will be $110 (8GB) and $130 (16GB). Less expected: A cheaper E Series Walkman will arrive at the same time.
The S Series also has a recordable FM tuner (with 30 presets), and a Lithium Ion battery rated for a 42 hours of audio, or 6.4 hours of video playback. That's pretty decent...unless you use the built-in stereo speakers. Rocking out loud will drop music listening to 17 hours, and video playback to 5 hours.
As expected, format support includes JPG photos, MP3/WMA/AAC audio and H264/MP4/WMV 30fps video.