Another Ubuntu 10.10 upgrade guide, this time from Howtogeek.

Ready to jump on the latest Ubuntu, but don?t want to mess up your current Ubuntu installation?  Here?s how you can painlessly upgrade to Ubuntu 10.10, or any later normal release of Ubuntu, directly from the Update Manager.
Ubuntu is designed to make it easy to install the latest versions of all of your software.  The Update Manager will give you small updates over time, but can also let you automatically upgrade to the latest release of Ubuntu.

  Upgrade to the Latest Ubuntu the Easy Way