Hi Andrew,
I managed to get openmv to run on both STM32F4DISC (Everything works) and the STM32F429DISC (without working SDRAM and SDCARD). You can checkout my folk with the minor code changes to get it working on the STM32F4DISC.
https://github.com/superted6851/openmvThe master branch works with STM32F4DISC.
I just used a dot circuit board and thin wires to connect up the camera and SD-card. Just wire it up as shown in the openmv1 schematic.
Cheers,
Nick