Phase change memory is finally here according to micron

Micron outs 45nm 1Gb phase change memory - The Inquirer

Right now looks like 1Gb and 512mb chips for smart phones but this would be pretty bad ass. Basically this is Non-Volatile memory (which means retains information without any power). Look for very speedy boot times.
Micron is the first company to get this to high volume mass production.