http://www.mram-info.com/
http://www.linuxdevices.com/news/NS3594361633.html
Freescale is shipping what is claimed to be the first commercial Magnetoresistive Random Access Memory (MRAM) chip. MRAM, which combines magnetic materials with conventional silicon circuitry, can deliver RAM-like speeds, flash-like nonvolatility, and unlimited "endurance," according to the company.
The first commercial MRAM chip is a modest one, offering just four megabits (Mbits) of data storage and intended to replace typical battery-backed SRAMs. The MR2A16A supports a commercial temperature range, and is a 3.3 volt device with 35 nanosecond read and write cycle times. It is an asynchronous memory organized as 256K words by 16 bits.