I've just compiled Open Solaris based on Nevada build 14. It took 58 minutes on 2-way x86 system - I have to try build Open Solaris on a faster hardware :) One among many new features introduced in build 14 is Solaris New Boot architecture on x86/x64 platform based on GRUB.
Here is a grab of a boot screen
And here is a console login - notice how clean console is after Solaris booted! (actually it's been that way in S10 since SMF was integrated), and now by default background is black (some people prefer that way).
Notice that now there is no more Configuration Assistant or that ugly boot manager on Solaris x86/x64! It's now more clean and boots faster, much faster.
When Solaris SX will be based on build 14 or newer then it will of course include this new boot architecture - so look closely at it.
And the day when Open Solaris will be available to the rest of the world is coming! :) So saying in Sun style: stay tuned! :)