"OpenBSD is free as in air," Theo de Raadt [interview] stated in a recent thread on the OpenBSD -misc mailing list. The discussion began with a note that the Open Sound System [story] had recently been "open sourced" under the GPLv2 and CDDL leading Theo to comment, "noone cares about being Open and Free anymore. They just care about being called Open and Free, and how convenient -- a bunch of laywers generated an organization that will label them Open and Free when they are not in fact so."
Later in the discussion it was asked why the OpenBSD project used the BSD license rather than simply releasing the code into the Public Domain. Theo explained, "we wish to retain the legal right to be known as the author, and not have our names taken off the files. With public domain, that stuff at the top of the file is taken away first, before anything else is done," noting that this is explained in the license at the top of each file, "just that bit; nothing else."