anything by Prodigy should do it, Smack My Bitch Up or Firestarter

My suggestion to what you are probably after would be best called 'Ambient Music' - see wikipedia article

An excellent introduction to electronic ambient would be Aphex Twin's 'Selected Ambient Works', nice and relaxed.

If you prefer soemthing a little more vocal heavy then the 'Winter Chill' collections are good, but a lot of it might be a little too heavy for background music.

If you're more into world music then take a look at some of the 'Budda Bar' collections, again quite vocally, but might be what your after.

If classical is more your thing, and you want something not too obtrusive try some of the stuff by Philip Glass, the etudes or anything from the sound track to 'The Hours'

Anyway that's my 2p's worth.

JT

I have some good classical chillout stuff that I can let you have, it may be what you are looking for

I could sing them or play them on the piano if you want - for free

Debbie has got a scuba diving game for the Wii, perhaps you could get it too and then when you play it you can sit there with a tape recorder.
Instant scuba music for free.
See how helpful I am
 

Adz,

You are just too brilliant! I'm sorry that your satirical wit is so unappreciated (but not too sorry). I would have responded sooner but haven't been able to stop laughing.

I can offer copies of the Beatles' Yellow Submarine,  10cc's "Deceptive Bends", David Bowie's Low (and possibly "A lad in Seine") as far as albums go (I don't have Jean Michel Jarre's Oxygene)

oooh the wit.... falling off my seat with laughter....not
tell you what i'm off to the shops to spend the clubs money on all the albums you lot have suggested
now that would be funny
jonathan