Apple looking for a third NAND chips supplier

Apple is discussing with Hynix about low density NAND chips to be used in iPod Shuffle (512MB and 1GB)
It seems that Apple would like to get a larger panel of suppliers for NAND chips, probably to avoid to be linked with a single provider, and also to avoid NAND chips-based product to be strongly impacted by any technical or business issue that could target this single manufacturer. Apple is also for sure trying to get the best offer between different competitors.