AVR & RFM70 based digital wireless guitar system

Hi,

During last weeks I've asked here a few questions regarding the wireless
guitar system I was working on.
Now the initial version of website describing my system is available
at: http://www.ise.pw.edu.pl/~wzab/wireless_guitar_system

The design is FREE. Most parts are public domain, some are licensed under
GPL and/or Creative Commons license.

This is still a prototype version, built on breadboard. I'll appreciate
any comments or suggestions allowing me to improve it before the final PCB
is designed.

The main features include:
* Low price, main components are: CS5343, RFM70, ATmega88 in the
  transmitter; RFM70 and ATmega32U4 inthe receiver
* Transmission of 20bits/24kHz sound (emulated 24bits/24kHz; it is possible
  to modify sources to emulated 24bits/48kHz if it is needed for Windows
  compatibility)
* Transmission of settings of 4 potentiometers and 4 switches via USB MIDI
  commands - you can adjust settings of your virtual amplifier/sound
  processor with controls located near to your guitar
* Tested with Linux+jack+alsa_in+guitarix/rakarrack/ardour
* Not tested with Windows

I hope, that this design may be usefull for someone, but please note, that
this is very initial release yet.
--
Regards,
WZab