Yesterday, Oracle announced the Solaris 11 Early Adopters release, a new bunch of ISOs are available for download, only for Gold members of Oracle/SUN.
Anyway, if you’re a lucky one, you can have it here.
Rumors said in the wild that theses ISO are based on the build 172 or 173, I’m currently busy downloading ISO to give it a quick try..
EDIT: Confirmed, the build is rev 173 EDIT2:
Zpool version is now 33 which introduces “1MB Block size” as well as “Improved share support”.