You can look at this:
It’s 8Gb, 1GB, and $17 a piece.
From the datasheet:
[quote]Micron NAND Flash devices are specified to have a minimum of 2,008 (NVB) valid blocks
out of every 2,048 total available blocks. This means the devices may have blocks that are
invalid when they are shipped. An invalid block is one that contains 1 or more bad bits.
Additional bad blocks may develop with use. However, the total number of available
blocks will not fall below NVB during the endurance life of the product.[/quote]
[quote]Over time, some memory locations may fail to program or erase properly. In order to
ensure that data is stored properly over the life of the NAND Flash device, certain precautions
must be taken:
• Always check status after a PROGRAM, ERASE, or DATA MOVE operation.
• Under typical conditions, use a minimum of 1-bit ECC per 528 bytes of data.
• Use a bad-block replacement algorithm.[/quote]