Microcontroller related analysis

We have a project that requires some work with Microcontrollers and possibly logic analyzers. We need someone with considerable experience to do some low level serial work interrogating a memory card. (Like SD-Micro, MMC). We need to be able to read and write this device but we have no documentation. So some analysis of a device in use on a PC will be needed. The Microcontroller used is unimportant to us, we use ARM based microcontrollers in our target application, but any MCU you are used to is acceptable, we simply need documentation of the protocol. The protocol used is probably SPI so knowledge of this protocol is essential. Knowledge of Subversion is an advantage.