Oracle Solaris 11 released
blogs.oracle.com
blogs.oracle.com
If you have "regular" hardware (1-4 sockets), you pay 1k/server/year. No "I know what I am doing" with this OS, but meh. 5+ sockets is 2k/server/year.
This is really, really too much if they want to re-kindle Solaris as mainstream thing. FreeBSD seems like a safer bet then OpenSolaris.