I had a look at this just this week. One problem; all the io libraries out there rely on special functionality in the broadcom chips and thus don't work with th

I had a look at this just this week. One problem; all the io libraries out there rely on special functionality in the broadcom chips and thus don't work with the knock-off boards. Meaning anything that needs gpio/spi/i2c/serial can't run on a clone board without a code rewrite.