Re: Raspberry Pi @Nick Pettefar
Don't get me wrong. I'm System V through-and-through, but you have to regrettably admit that it's pretty dead now.
OK, Solaris and AIX are still mainly System V versions of UNIX, but I can't see IBM doing an R-Pi port of AIX any time soon, and I think that the license for OpenSolaris would prohibit a port.
In case you hadn't noticed, UnixWare (the last linear descendent of the Bell/AT&T code) of pretty much died with SCO, and any chance for a reversion to Novell died when it got subsumed into Attachmate. That pretty much killed any chance of a new System V variant.
And there's an interesting point. I wonder who you would approach if you wanted to become a new System V source licensee? The OpenGroup?