Founded in 2004, MagSil Corporation headquartered in Silicon Valley is developing a revolutionary MRAM. MagSil's tech relies only on using industry proven equipment, processes and materials. They have an exclusive license to an MIT-developed technology, includingone for HD heads (they have filed suits against Seagate, hitachi, WD and others, and have settled with most).
In August 2010 Magsil scame out of "stealth mode", giving more info about ther technology and patents. They plan to make a 1Mb MRAM chip in 2010.
MagSil's web page