Sony is still keeping mum. But from what little details we would garner from the Internet, the NW-E series seems to have adopted the same translucent design used in the NW-A series. Judging from the picture and the memory capacities (up to 2GB), we are guessing it will have at least the same or smaller form factor of the NW-A600.
Though we were initially hazarding that this MP3 player would be replacing the NW-A600, the fact that it sports a USB jack and a different series name suggest that it might not. One thing of note is that blog site AtracLife mentioned the NW-E series will be shipping with the older Sonicstage 3.4 instead of the Connect Player software which has been accused of sluggish performance.
Sony Asia was unable to comment on the availability of the NW-E series at press time.
More info here