and why not multi-microprocessor ?

After having play just a bit with the AVR32, I am not convinced. This chip looks young, there are not many people developping on it, it is still in an early phase for Atmel, can't found that many examples, it requires the use of an OS like freeRTOS, flashing under USB and linux is a boring, etc...
To stay with simple 8 bits chips, I am thinking to use a multiprocessoir architecture, like mrdunk robot each processor dedicated to its own task, all communicating through i2c. The drawback of this, is that it add more electronic, but the good thing is that it is more flexible, new feature can be added to the transmitter without worried too much about performance and impacts on the other components.