I totally envy people who have an ethernet connection, while installing arch Linux

Pro-tip that saved me once or twice:

Connect an Android phone via USB, and in the options activate USB tether.

The desktop will recognize the phone as a network card and use the connectivity provided by the phone

PS:
Worked on Ubuntu, hope it applies to arch as well

@alesg Router ←→WiFi ←→ phone ←→ USB ←→ device
Ah, the lengths we go through to install Arch...

Unfortunately using a USB tether is probably harder than just setting up wifi... Just don't forget the dialog and WPA packages and you should be good!

Have had to go back to a Live CD many times to fix that, it is actually a bit of a nightmare xD

Just create a custom archiso with wicd-patched (AUR) installed... Ncurses gui for wireless cards!

@soulsuke The archiso already comes with wifi-menu, which is basically what you just described. It's also included in the base package.

One thing that really grinds my gears though is that 'dialog', a dependecy for wifi-menu is not included in base.