It's unlikely that this call for unification will result in any action, but an independent user has written a brief statement cross-posted to several BSD mailing lists about a Unified BSD? The user asks why the BSD community can't band together and form a unified platform rather than fragmenting their resources into several different projects/forks/distributions. He wants to see the four largest BSD variants merged: FreeBSD, OpenBSD, NetBSD, and DragonflyBSD.
It's very unlikely that this would ever happen, just as it's unlikely that all of the Linux distributions out there would ever converge upon one central distribution. However, it's interesting to think about and discuss.
For those not familiar with the major BSDs, DragonflyBSD was forked from FreeBSD 4.8 to implement alternative kernel design changes but these two BSDs do continue to share some resources and code. NetBSD meanwhile likes to focus upon portability and clean designs while OpenBSD is a very old fork of NetBSD that additionally prides itself upon security and cryptography abilities. The code-bases of these four BSD operating systems have wound up quite different at all levels over the many years of development. There's also many other smaller BSDs out there too.