It is possible, but don't ask. ;-)
I was a little bit slacking with me keeping Drupal not very up to date recently. I was still running 6.5 and 6.8 has already been released with some important security fixes.
When upgrading to Ubuntu 8.10 from 8.04 apart from the usual considerations I stumbled across these things:
is 18.104.22.168, you should upgrade to IPv6