Today, kvm-73 was released featuring yet another merge with qemu-svn. Notable features added with the latest release include guest memory swapping but this requires a host running 2.6.27 kernel. Other features include performance improvements for virtio-net as well as qcow2 with cache=off. The official changelog from the development mailing list is included below.

Changes from kvm-72:

- merge qemu-svn
- improve qcow2 performance with cache=off
- ide fixes
- ia64 external module (Xiantao Zhang)
- external module compatibility with 2.6.27 hosts
- fix sysenter msrs save/restore (Alexander Graf)
- fix 2.6.26 host support (Nikola Ciprich)
- fix linux-user build (Philippe Gerum)
- virtio-net speedup (Mark McLoughlin)
- fix ./configure with multiple arguments
- support Windows hibernation on non-FlexPriority hosts
- fix makefile dependencies (Sheng Yang)
- fix compiler warnings (Jan Kiszka)
- work around dhclient checksum offload brokenness (Anthony Liguori)
- full swapping support (Andrea Arcangeli)
- needs 2.6.27 hosts
- internal irq ack notification api
(Marcelo Tosatti, Amit Shah, Ben-Ami Yassour, me)
- fix pit timer interrupt injection logic (Marcelo Tosatti)
- paravirt guest: query tsc frequency from host (Glauber Costa)
- pci device assignment (Amit Shah, Ben-Ami Yassour, Weidong Han)
- still lacking dma
- fix large page crash on z10 mainframes (Christian Borntraeger)
- stack usage reduction (Dave Hansen, Sheng Yang)
- code cleanup (Sheng Yang)
- fix debug register corruption on Intel hosts (Marcelo Tosatti)
- fix -no-kvm-irqchip
- fix irq acking on pic reset (Marcelo Tosatti)
- ignore spurious timer interrupt acks
- limit device assignment to privileged user (Amit Shah)
- big real mode emulation framework (Mohammed Gamal)
- simpify irq injection (Amit Shah)
- dummy irq ack notifier for ia64 (Xiantao Zhang)

You can download kvm-73 here.