Hello tjferre,
I've moved your post from the VMware Workstation Technology Preview 2013 forum to the VMware Fusion Technology Preview 2013 forum.
As an answer to your question. Yes multi-monitor support is available in VMware Fusion guests.
In the menu "View" the option "Use all displays in Full Screen" will enable the feature to your guest.
Have you tried and are you having problems with it?
hope this helps,
--
Wil