Actually !
I am in a position where the only sd card I have is the one in my camera, but I have many variety of memory stick pro duo from my years of owning a sony psp
Looking into "it", it appears to be almost identical to SD in its most basic form, ie toggling memory bits (like a eprom, not fat filesystem), and believe that the information contained in this thread with little translation could be useful
I have made a breakout socket out of a MSPD (small) to MSP (large) adapter, but I need to wait till the weekend before I can try it
and the document I am working from