Jackie, buy CD/R rather than CD/RW's....the CD/R is readable by all standard CDROM drives and they're cheaper. Buy name brand in a case, don't be tempted by the bulk non-name brand cheapies...they can be unreliable.

Also, if you've only got the standard memory card that came with your camera, consider buying a 64MB or even a 128MB card and use that first....that way if you run out of space on the camera you can always pop in the standard card that came with the camera until you get to one of the Internet bars to download and copy to the CD/R.