VirtualBox with the new OpenSolaris
Downloaded the latest OpenSolaris from the new OpenSolaris.com. That's the latest build 86 with ZFS as root filesystem. Everything is smooth except I cannot resolve hostname, with this error message "node name or service name not known".
wgetbased on ip address is ok, but not via full-qualified name. This workaround resolved the issue.
It seems there is quite a fair bit of different between this build and Solaris 10 U4. Need to find time to explore further.