Connecting to the wireless is relatively simple. (I could rage here for a bit, but I'll try my best to refrain from making comments regarding this "experience".)
So. After some struggle, you have wifi in your installer. You can install Ubuntu Server and everything is alright. You are ready to boot your new system.
You had wifi configured up in the setup. Guess you will have a connection.
Guess again! The settings are not transferred, so you are left in the black with no internet connection.
How do I connect to a wireless (WPA2 Personal) network from Ubuntu Server 12.10?
U1: First time I could connect with iw* commands. And then I was able to get an IP with dhcp client. This worked, so with my happy face, I put the commands into /etc/rc.local. Then I saw that the server waits 120 seconds to boot "Waiting for network to come up".
So I removed everything from /etc/network/interfaces (wpa-psk and wpa-ssid).
This did not work. It was still waiting. So I found an answer, which said I could just remove the /etc/... (the file that was in charge of the 120 second wait time.)
So I did! I moved the file under root, so I could have a backup.
Now the server waits ~3 seconds (modified sleep within the file) and it boots up.
But now, there is no connection again! It's some dhcp error.
U2: Now as I was out of options, I tried using the one in comment. The one that used "tee".
Turns out it does not work either.
rage with no solution: With all my respect, let me just express my rage in a few words.
How can this whole thing be so uncosistent? How can they not install the firmwares on the ISO while it would perfectly fit (673+~10MB = 683). How can the installer NOT copy the necessary files and set up the connection to be used later? (Or ask if the user wants to use it.)
What a mess. A terrible mess.