I don't know I tried finding out myself but couldn't find an answer. I also shoot in raw @ 8.2 mb and figured I can only get about 90 shoots on a 1 gig card and that a cd only holds about 720 mb so at $12 a disk at WDW it would get expensive, I also read you have to give them your card and they will get it back to you in 24 hours, sorry I need the cards and can't go without for that long or take a chance they would lose them. I searched around and finialy decided to buy a portable storage unit, I bought the Epson P-2000, very nice and can view and confirm photo's where transferred.
There are other devices out there , even portable DVD burners, good luck in what you decided to do.
Epson P-2000 link
http://www.epson.com/cgi-bin/Store/...@@@@&BV_EngineID=cadddlkhmelgbfdmcfjgckidnk.0