I am controlling a GPS, a Magnometer, Transciever and Blackfin Camera over UART, Gyro and battery board over I2C and a couple of magnotorqers (basically electromagnets used for controlling a satellite's rotation) via a H-Bridge.
I already own an Axon for myself but I'm slightly 'modifying' it to suit the project, so I'm getting the Uni to replace mine
I won't be having interrupts too frequently so that shouldn't be an issue, I'll just make sure I resend data which doesn't look right. I have a magnetometer which isn't as mission critical as the GPS so I'll probably just use that since it will only have a pretty slow refresh rate. I'll let you know how all of my testing goes.