New upstream versions of virtinst and virt-manager are available via Debian's experimental distribution. All the bugfixes we carried as patches have been applied upstream by Cole Robinson, which is great. New features include disk- and newtork-I/O graphs and direct support for installing paravirtualized Debian Lenny Xen Guests via:
virt-install -n xenfoo1 -r 96 --disk path=/path/to/file,device=disk,size=1 --location=http://ftp.nl.debian.org/debian/dists/testing