SanDisk is considering a write-once memory card that is being designed as long-term storage option. It is rumored that the memory cards will be 1GB in size and retail for $5.99 each. These new cards would be marketed in “food, drug, camera, and convenience stores” and be “less expensive than standard re-writeable memory cards.”
No one can argue that they are less expensive than read/write cards on an individual basis, they just do not seem cheap enough to make them worth the money. Currently you can get a 1GB read/write SD card from SanDisk on Amazon for just $9.99, which means that for just a few dollars more you at least have the option of re-using the card.