can't use sudo after a fresh install (karmic)

Binary package hint: sudo

I just try karmic-server-amd64 (Alpha-2) and I can't run sudo on it.

ssh testor@192.168.122.80
testor@192.168.122.80's password:
Linux ubuntu 2.6.30-8-server #9-Ubuntu SMP Wed Jun 3 16:37:12 UTC 2009 x86_64

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

To access official Ubuntu documentation, please visit:
http://help.ubuntu.com/

  System information as of Tue Jun 16 18:10:01 CEST 2009

  System load: 0.03 Memory usage: 7% Processes: 68
  Usage of /: 60.1% of 895MB Swap usage: 0% Users logged in: 1

  Graph this data and manage this system at https://landscape.canonical.com/

35 packages can be updated.
0 updates are security updates.

Last login: Tue Jun 16 18:09:18 2009 from 192.168.122.1

testor@ubuntu:~$ sudo date
[sudo] password for testor:
testor is not in the sudoers file. This incident will be reported.

testor@ubuntu:~$ id
uid=1000(testor) gid=1000(testor) groups=1000(testor)

testor@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu karmic (development branch)
Release: 9.10
Codename: karmic

testor@ubuntu:~$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 896M 538M 313M 64% /
tmpfs 245M 0 245M 0% /lib/init/rw
varrun 245M 72K 244M 1% /var/run
varlock 245M 0 245M 0% /var/lock
udev 245M 156K 244M 1% /dev
tmpfs 245M 0 245M 0% /dev/shm
/home/testor/.Private
                      896M 538M 313M 64% /home/testor