Flagday for Crossbow
One of the most interesting upcoming features of Solaris found it. The first parts of the results of PSARC/2006/357 Crossbow - Network Virtualization and Resource Management were integrated yesterday into Opensolaris Build 105.
Crossbow provides the building blocks for network virtualization and resource control by creating virtual stacks around any service (HTTP, HTTPS, FTP, NFS, etc.), protocol (TCP, UDP, SCTP, etc.), or Virtual machine (Containers, Xen and LDom based hypervisor xVM virtual machines).
As you can see from the year in the ARC case number, it´s one of the large projects at Opensolaris, as it was under steady development since that time. You will find more information at the projects webpage on opensolaris.org.