ok, loop wasn't a problem, but the guest doesn't boot and stop right after "IPv6 over IPv4 tunneling driver"
i'll try another guest kernel and keep you update
ok, here my update, i used the xen kernel from lenny to boot the guest and it worked.
With xm console it worked but stopped here
INIT: Entering runlevel: 2
Starting enhanced syslogd: rsyslogd.
Starting OpenBSD Secure Shell server: sshd.
Starting periodic command scheduler: crond.
I don't get a login shell but with ssh i can connect to the guest. but there is still a problem that the xm console doesn't work properly.
in the logfile of xen-create-image i've found these warnings
Can not write log, openpty() failed (/dev/pts not mounted?)
Setting up udev (0.125-7) ...
unable to open device '/class/net/*'
A chroot environment has been detected, udev not started.
ok, that's all not a problem with xen, so not a probem with this tut