Intel and Micron's IMFT joint venture's just announced they've started producing NAND flash using 25nm transistors—they're pushing 8GB on a single die—with products shipping sometime this year in fatter capacities (up to 600GB). In English:

Using the smaller 25nm manufacturing process, they can get roughly twice as much storage in the same amount of space as the current 34nm flash manufacturing tech. More storage in the same amount of space, as we learned before, doesn't just mean more storage, it means more storage for cheaper. [Anandtech]