The most affordable of the three new Walkman phones from Sony Ericsson this time is the W302.
Still great quality with Aluminium front and only 10.5mm thin. It's got 2-inch screen, FM Radio, 2 megapixel camera and A2DP.
Available in the last quarter. No information about price yet.

Sony Ericsson W302 specifications:
10.5mm slim
2 inches screen, 176x220 pixels
Aluminium front
Walkman player
TrackID
FM radio
2 megapixel camera
TrackID
Bluetooth Stereo (A2DP)
GSM/GPRS/EDGE 850/900/1800/1900
Internal Phone memory: Up to 20MB
512MB Memory Stick Micro (M2) included
Music listening time: Up to 10 hours
Standby time: Up to 300 hrs
Talk time GSM: Up to 7 hrs
Weight: 78 grams
Size: 100 x 46 x 10,5 mm
Will be available in Midnight Black and Sparkling White in Q4 2008.