My firmware doesn't distribute freely and I've made it about month ago.
Features of the last release:
1) Frequency range from 2.1GHz to 2.5 GHz, so u can avoid interference from others wifi devices and get free of noise channel.
2) Output power up to 500 mW.
3) Bandwidth up to 45Mbit/s. With 21dB antennas at 10km link.
4) Immune to noise from other wi-fi devices in special operational mode.
It's firmware made for long-range&high-speed bridge links. There is no AP mode in it, only WDS.