Sony 4GB M2 Card Memory Stick Micro 4G for Sony Ericsson Phone & PSP Go | eBay
Memory Stick to M2 (PSP Go) adapter now available! | GBAtemp.net - The Independent Video Game Community
M2 Dummy Adapter - PSP Developer wiki
PSPGO M2 Memory Card Dummy Adapter on Sale - Hackinformer
M2 With Adapter Memory Stick Micro Into Memory Stick Pro Duo 512mb 1gb 2gb 4gb 8gb Ms Pro Duo - Memory Cards - AliExpress
Peter McDaniel on Twitter: "Upgraded my #PSP Go tonight. I really didn't want to lose anything on my 8GB card but I didn't want to pay upwards of $40 just for 16GB.