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DragonFly BSD 3.0 Released
An anonymous reader writes with word of the release earlier this week, after eight months of development, of DragonFly BSD 3.0. The release includes improved scalability through finer-grained locking, improvements to the HAMMER file system in low-memory configurations, and a TrueCrypt-compatible disk encryption system. DragonFly is an installable system, but it can also be run live from CD, DVD, or USB key.
The BSDs - FreeBSD, OpenBSD, et al, would have to go through an official and formal certification w/ the Open Group in order to be certified as Unix. I don't doubt that they'd pass, but then, I don't doubt that Linux would pass either. That too, every version would have to be certified separately. I doubt that any distro would want to go thru the expense of doing it, and so the only certified Unixes out there are the ones like Solaris, HP/UX, AIX and OS-X.
The licensing issue is also somewhat tangential here - if a BSD has something that Linux hasn't, a customer will have no issues working w/ BSD, since BSD code can be incorporated in and released as a part of anything from proprietary to GPL3 software. If Linux has something that BSD hasn't, customers who need it will work around it, like Google did w/ Android. On the Linux side, I can see it getting confusing, since Linux is not going to become GPL3, but the things it uses - glibc, gcc, etc have become GPL3, which is a source for potential confusion.
Aside from that, I agree w/ the others like kestasjk below - few will care about whether it's genuine Unix or genuinely free software.