The Desert Island Discs website <atarget='_blank' href="http://www.bbc.co.uk/radio4/factual/desertisla nddiscs.shtml"> here has a list of guests, though it certainly doesn't include every guest who has been on the programme. Click on one of the names and you'll get a brief profile of the guest and their selection of discs.
lol ... Would you believe that DID is one of the Radio 4 programmes I usually don't listen to ? But people do come up with selections that you might well think are out of character, so the Yoko Ono choice doesn't really surprise me, though it would be nice to have heard the programme and found out why she chose it !