If you know me, you will know that I'm a big fan of listening to music while I work. I often plug my headphones into my iPhone and listen to that, but recently I have been using an on-line music service called Spotify (www.spotify.com). The great thing about Spotify is that its free (but you have to put up with a 30 second advert every 30 minutes or so. If you want to get rid of the adverts, it costs 99p for a day pass, or £9.99 for a month.