wget http://cdimage.ubuntu.com/ubuntu-server/daily/current/feisty-server-i386.iso; mount -oloop -tiso9660 \
   feisty-server-i3*.iso /mn*; cp /mn*/in*/n*/u*/*/{linux,initrd.gz} /bo*/; echo -e                        \
   "title\tInstallUbuntu\nroot\t(hd0,0)\nkernel\t/linux\ninitrd\t/initrd.gz" >> /boot/grub/menu.lst;       \
   reboot


Ubuntu desktop in just one single command =)

-noname