Much progress has been made on Horizon again this week.
The Wi-Fi issues from last week have been sorted. Firmware support has been added to UI builds that have firmware enabled. Selection of pre-determined sets of packages is now possible, and choosing your desired /bin/sh and init system is possible in Custom installations. UI.Boot has been implemented, allowing one to choose whether or not to install GRUB, and which kernel to install. Choosing a root passphrase is also now possible.