I'm pretty sure the software side of the project is a direct descendent from the WRT54G stack.
LinkSys got sued to release the firmware as it was GPL linked. This dump got modified to make the WRT54G way more powerful than LinkSys ever planned but they got to sell the hardware for years more than would have been expected at the time.
Yeah, I loved it because it allowed me to boost the signal above FCC-approved power requirements and saturate my house with that sweet 2.4GHz connection everywhere.