Une équipe de "Univention Corporate Server" s'est portée volontaire pour proposer des drivers proprements signés. Ces derniers sont disponibles à http://apt.univention.de/download/addons/gplpv-drivers/ Ca fait toujours plaisir ce genre de news. Je n'ai pas testé la version de 2003 x64 proposé bien que pour ma part, j'ai compilé ma version personnelle pour 0.11.312. Il est vrai que sans certificat, c'est un peu lassant les problèmes de certificat apparaissant lors de l'installation. Voici le mail qui a été posté sur a été posté sur la mailing-list de Xen-devel :) 
Hi,
for inclusion in Univention Corporate Server - a Linux distribution based on
Debian targeted towards enterprise environments, which also includes Xen for
virtualisation - we're now building/signing the excellent GPLPV drivers
written by James Harper with a Software Publishers Certificate obtained from
GlobalSign. [1]

This allows installation of the GPLPV drivers on 64 bit Windows without the
need to enable the test mode.

The drivers are available from http://apt.univention.de/download/addons/gplpv-
drivers/ and should be compatible with any Xen installation.

The installation is detailed in
http://wiki.univention.de/index.php?title=Installing-signed-GPLPV-drivers

So far only new installation of the GPLPV drivers have been tested. We welcome
general feedback and experiences with upgrades from test-signed versions of
GPLPV.

Cheers,
Moritz

Footnotes:
[1] We're well aware of the recent claims of a potential compromise of that
CA, but as of today this is still under investigation:
http://www.globalsign.com/company/press/090611-security-response.html
-- 
Moritz Mühlenhoff                        muehlenhoff@univention.de
Open Source Software Engineer and Consultant
Univention GmbH  Linux for Your Business    fon: +49 421 22 232- 0
Mary-Somerville-Str.1  28359 Bremen          fax: +49 421 22 232-99
http://www.univention.de