In a surprise move, Sony has created a proprietary card format for their products. It's called the Sony M2, and is smaller than the Sony MemoryStick Duo and supposedly can eventually hit up to 32 GB in storage space. The official dimensions are .6" by .5" and just over a millimeter thick. Smaller is better? Hell no, the original MemoryStick was a fine size and the Duo was even a decent physical size, but this is just asking to be easily broken, stolen, lost, misplaced and/or ingested. Please try again.
The M2, the new Memorystick [Akihabara]