You can check the schematics with Fritzing.
https://github.com/Beat707/Beat707-NXT/ ... s/Fritzing
There are some pictures there too, in case you want to take a quick look without installing Fritzing.
The board should work great with the design. I'm using the ATmega328 internal OSC at 8 Mhz and 3.3V so I can talk to the Flash chip direclty without having to worry about voltage conversions. I just need to test MIDI Input, to double check that I did things right, as I connected the 4N35 to 5V. It should be ok since the ATmega328 supports 5V Pin Input.
You can also PreOrder the board from our site. Only $ 29.95 USD + Shipping
http://www.beat707.com/w/purchase/beat707-nxt
Cheers, WilliamK