keywords: ipod sony mp3 walkman device
text: An MP3-capable Walkman is set to challenge iPod If at first you don #39;t succeed - and you #39;re Sony - it #39;s a good bet that success is a mandate the second time around. ... la the ubiquitous iPod - Sony #39;s last stab at a hard-disk-based digital music device sank with only a trace.