Samsung has just announced a new 64GB memory moviNAND that could be used in the next-gen iPhone, which is 
rumored to be out this summer, as with Apple’s usual iPhone release time.
The chip measures 1.4mm in height and it’s composed of 16 30nm-class 32Gb MLC NAND chip and a controller. It’s expected that we might see this new chip, as each new iPhone is shown a bigger size is released so 64GB could be on the table for the iPhone 4G.
Toshiba, meanwhile announced the upcoming release of 64GB NAND chip, so it might be either Samsung or Toshiba.
Sam's Blog 