Thanks mhan, I appreciate the other link. I think I had taken a look at that one too. I'm going to follow Alex's format and and start a bitbake. While it's running, a few questions for you both:
1) Should the echo command in the .cfg file refer to wpa_supplicant/ or ../wpa_supplicant/ since it is located in the files/ directory?
2) I see that there's a file called wpa_supplicant.conf in the bitbake package directory for wpa_supplicant. However, it's only a sample conf file. Should I append the CONFIG entries to .config or wpa_supplicant.conf?
Thanks again!
Matt