Yes, they have firmware blobs like [0] or [1]. When looking for blobs in OpenBSD [2] I found one bad thing that Linux does and OpenBSD doesn't: none of the sourceless blobs are GPL-licensed which would make distributing them a GPL violation.
[0] http://svnweb.freebsd.org/base/release/9.1.0/sys/contrib/dev/ipw/ipw2100-1.3-i.fw.uu?view=markup [1] http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/bce/if_bcefw.h?rev=1.9.2.3.2.1;content-type=text%2Fplain [2] http://b.mtjm.eu/nonfree-firmware-linux-openbsd.html
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