Linux Dynamic memory support – Provides higher virtual machine density/host for Linux hosters.

Live Virtual Machine Backup support – Provisions uninterrupted backup support for live Linux virtual machines.

Dynamic expansion of fixed size Linux VHDs – Allows expansion of live mounted fixed sized Linux VHDs.

All (and more) have been integrated in to SUSE Linux Enterprise Server 11 SP3 and will be in the upcoming Ubuntu 13.10 and** RHEL 6.5** releases.