Images from Nizar Kerkeni's blogpost
Softpedia takes a quick look at when each of the Ubuntu versions was released, and what it brought: http://news.softpedia.com/news/Happy-Birthday-Ubuntu-124827.shtml
If you want to take a closer look at the history of Ubuntu, check out Dustin Kirkland's Ubuntu Museum.
The official Ubuntu 4.10 "The Warty Warthog" announcement can be found here: https://lists.ubuntu.com/archives/ubuntu-announce/2004-October/000003.html
