It seems to be ready now if you are willing to manually copy the templates and set a few references for the interactions and interactivity package. There was only one minor problem that showed up in a couple of the examples -- I think it was a refresh
indicator that I just commented out. For me the time it took to manually configure was paid off quickly by the ability to use some of the new features in VS2012.
I am learning lots of ways to do things in WPF with Simple MVVM toolkit so now my biggest issue is understanding the tradeoffs between the many options. I am really happy with the way it works with an Entity Framework data model and an nHibernate
example Tony posted a while back was very helpful.