Almost silently the US startup Qumranet, famous for supporting the KVM development, accomplished a remarkable achievement: releasing para-virtualization network drivers for Windows guest OSes.
The drivers are available for Windows 2000 and XP (signed versions) as well as for Windows 2003 (unsigned version), are for 32bit systems only, and can be used with KVM-61 or later.
Using dedicated para-virtualization drivers, guest OSes can often improve performance as also VMware confirmed.
Haydn Solomon, the Qumranet developer who published the news, provides a step-by-step installation guide just in case it’s needed.
Download the drivers here.