http://www.openbsd.org/users.html

under "Research and other Non-Commercial Users", feel free to add:

School of Earth and Space Exploration, Arizona State University, USA
SESE uses OpenBSD for nearly every public-facing server we manage.
Being an academic institution, many of our systems run OpenBSD/sparc
and OpenBSD/macppc, including the public FTP/HTTP/AnonCVS server
mirror.sese.asu.edu. We also abuse OpenBSD on a number of authpf'ing
firewalls, proxies, and monitoring (nagios, cacti, nut, etc).

http://sese.asu.edu

edit as needed

thanks!
 marco