So I run the install script, select wlan0, set my IP to 192.168.0.1/16,
gateway to 192.168.0.1. All other options are defaulted. The
installation completes, I log into the admin interface and select the
one-hop-away option. When I reboot, I can see the SSID, but I can't seem
to get an IP. dmesg on my laptop shows a connection, but 30 seconds or
so later it dissociates and reconnects to another AP I've been using.
Really looks like DHCP isn't listening on wlan0 for some reason. In any
case, it never gets an IP, and the only logging I see is wifi radio-related.
Fortunately I have a DD of my original image, so I'm returning to that.
Any other thoughts on what might be going on here? Unfortunately it's
going to be difficult to get non-headless access to this thing. If it
fails again I can pull some logs off of the SD card if someone points me
to them. I'm restoring the original image now, and probably won't do
another round of this until tomorrow (I forgot to enable the
one-hop-away DNS setting on my first run, so this is my second
fail-restore cycle today.) 
Thanks.