There is a company called Storix that makes a mksysb-like product for Linux and Solaris. I just downloaded it to try for my Solaris 11 systems. Gonna play with Linux version too.
Solaris 11 Express is not beta. It is a production version which you can get support for. Whether is stable enough to call production worthy might be debatable.
I was searching around myself and found Storix bare-metal recovery. I just downloaded it so I don't know how well it works, but it reports to do exactly what I need. Checking out the Linux version as...