Unfortunately, only the DHCP code overhaul, Systemd utility replacements, GPT and UEFI support and modernizing the DHCP Daemon projects were able to except students according to
this (type OpenBSD into the "Organization" text entry).
Projects like porting the Nouveau driver, HAMMER2 or evdev (open possibility for Wayland support) appear to have not made it through. To be honest, I think most of those projects which were accepted are of more urgency then porting Nouveau, HAMMER or creating an evdev implementation as of this moment. This is especially the case for GPT and UEFI implementation as well as Systemd utility replacements (sadly).