There is a discussion on the osol-discuss mailing list this morning where
it's pointed out that OpenBSD source tree has a blob in it:

http://osdir.com/ml/opensolaris-discuss/2010-05/msg00095.html

The location of the blob in the tree is here:

http://www.openbsd.org/cgi-bin/cvsweb/src/sys/dev/microcode/afb/microcode.h?rev=1.1;co...

A posting from Alan Coopersmith from last December:

http://lists.freedesktop.org/archives/x-packagers/2009-December/000091.html

The only "official" OpenBSD position statement I could find is on the 3.9
lyrics page:

http://www.openbsd.org/lyrics.html#39

Where it says " OpenBSD remains blob-free"  - not true?