Ubuntu 10.10 “Maverick Meerkat” is available for download. We recommend you use a torrent as it is just out today and the main servers may be swamped, giving you slow download speeds, but peer-to-peer BitTorrent seems to be delivering good download speeds right now. This URL will take you to the Ubuntu Download page so you can select which arrangement(s) you want.
This Link explains the Ubuntu situation more as to where it comes from and how it can be free. This Link takes you to a nice simple page with a big orange button to push if you are uncomfortable making decisions about which version you need.