i have an ipod touch and use it as a web wi-fi device to complement 
my blackberry when I'm on the road and need to get on the net asap 
and my powerbook is too awkward and/or not available (ie at a gig or 
packed away) with various useful apps (currency exchange, weather, 
etc)

- i use itunes on my home/work computers to listen to downloads, 
stuff sent in, etc...

- i use home system for vinyl and cds and for critical listening

- boombox with cd & cassette for quickie listening to demos, etc... 
this is at the office

- DAT player when i need to listen to old masters and board tapes

- in the car, i play cds and i take  all new purchases on road trips 
(altho i am seriously thinking about using an FM signal thing to play 
my old cassettes through the car stereo from an old walkman like 
player since my new car doesn't have a built in cassette)

- and i just bought a 2nd hand ADAT player so I have it if I need to 
transfer old ADAT multi-tracks into protools, etc, for remixing

- i buy 99.9% cds, and the occasional iTunes track when I need a 
specific song and/or need to hear something asap

- always buying old vinyl and have a "rough" turntable to play rough 
looking vinyl that i know i will never find in playable condition and 
like to stack about 5-6 of these while i'm at the office working.... 
old-school
mixvinyl? on a 60s era Seabreeze changer...

http://www.bongobeat.com