Last year Sony announced it was launching yet another version of the Memory Stick, and soon you can begin adding Memory Stick Micro (aka M2) cards to your collection of Sony-specific media. Like MicroSD, MiniSD and TransFlash, M2 is designed to be used in cellphones, and chances are good that if you pick up any Sony Ericsson phone announced from now on (including today's newcomer, the M600) you'll have no choice but to go with M2 if you want to add storage.