Not exactly sure what fixed it, but after trying to connect again it gave me the option to skip, after spiking it connected to the Wi-Fi and downloaded & installed the firmware update. All working now.
Well, my optimism was short lived. The web terminal is broken again. Just "xxx.xxx.1.55 refused to connect". Setup works fine. I am using SSH for good maybe. I'm worried about the other web interfaces, but I don't have those break-out boards yet. This is not working on Chrome or Firefox. On a Mac.
@T-NT %This thread is now marked [Resolved]. You will have wider support if you start a new thread for your problem. About your questions - hardware support of 5.4Ghz band on Omegas would be news to me - haven't seen that yet. Why the 2.4Ghz wifi isn't appearing in the polling result - confirm that the wifi SSID isn't hidden or the protocol is TKIP-encrypted, as TKIP isn't currently "automatically supported" as posted by Onion here.
@luz Did you remove the resistor as suggested by Ken Konrad, so as to disable the internal antenna?
No, I didn't.
Now as you mention it, I remember having read that suggestion a while ago. Sounds like a logical thing to do - but as good as the WiFi is now as-is, I feel no immediate urge to treat my Omega2 with the soldering iron ;-)
Looks like your connection to Community was lost, please wait while we try to reconnect.