Well its not very hi-tech , but in the weekend I bought a Sony discman that plays mp3's for $150
I'm travelling for 6 weeks and couldnt stand the thought of being without personal music.
Its very good - using mp3 I can cram about 10 albums on to a CD. The LCD reads the mp3 tags so you can select by folders etc
They have software which can convert your audio CD's into a propritary format called ATRAC3 but I can be assed , mp3's work fine
Oh and I suppsedly get 60 hours play off 2 AA batteries - sweet !