According to the folks at DailyTech, Micron is making the drives out of NAND flash produced by IM Flash Technologies, its joint venture with Intel. The site also got word from Micron that the RealSSD C300 features "a new proprietary controller and firmware that was designed in partnership with [Marvell]" as well as 256MB of DDR3 cache memory, however, so this isn't quite a re-badged Intel X25-M with a faster interface.
Micron RealSSD C300 vs. HDDâ€”Everyday Tasks
You Tube Video: http://www.youtube.com/watch?v=dqnL3jX3dik&feature=player_embedded
Fastest Client SSD: Micron RealSSD C300 vs. Leading Competitor
You Tube Video: http://www.youtube.com/watch?v=p_xfoVdM9ic&feature=player_embedded