just something I have come across and thought it would be useful for a variety of stuff inc digital camera's, PSP etc.http://www.play.com/Mobiles/Mobile/4-/3382025/Sandisk-M2-4GB-Card/Product.html
The Memory Stick Micro (M2) is designed to meet the growing storage needs of highly compact, multifunctional mobile phones. Exchange data with standard-size Memory Stick PRO compatible products by inserting the M2 into the supplied adapter. M2 is approximately one-quarter the size of Memory Stick PRO Duo media, and only about 1.2 mm thick. Because it's dual-voltage it can be used with both mobile phones (1.8 volts) and Memory Stick PRO compatible products operating at 3.3 volts.
Please note that some older handsets will require a software upgrade to improve card speeds.
Dual voltage: 1.8v and 3.3v
Memory Stick interface (serial / parallel)
Average operating current: max 65 mA (serial transfer)
max 100 mA (parallel transfer)
Memory Stick PRO compatible
Minimum write speed: 15 Mbps
Environmental temperature: -25ºC to 85ºC non-condensing
Dimensions (W x L x T): approx. 12.5 x 15 x 1.2 mm
Weight: approx. 1 g