From the Xen-devel mailing list Keir Fraser, Project Leader at XenSource, announces release of new Xen 3.1.1 version.
The very short announcement reveals this is a bugfix release only. All vendors using the open source hypervisor (CItrix/XenSource, Virtual Iron, Novell, Red Hat and now Sun) are expected to update their products accordingly in the coming months.
Binaries for Xen 3.1.1 should be available shortly here.