It seems that Sony Ericsson has not forgotten its Walkman series and is probably looking to launch a new Android equipped Walkman Phone which is believed to be based on the Xperia X8. The W15, or so it is being called is said to support for lossless music format will boast a specially developed touch interface and special applications, which reflects the characteristics of a Walkman phone.
Rumoured Specifications:
Model Name: W15
CPU: 600 MHz
Display: 3 inch touch screen HVGA (480 x 320)
Camera: 3.2 mega-pixel
Other: *Dedicated Music Chip, Specialized Applications and Touch Interface