I think some of the screenshots on www.ubuntu.com are outdated.
For example, the menu screenshot on this page: http://www.ubuntu.com/products/whatisubuntu
is not the menu we see in 8.04.
Also, some text is outdated as well. For example, this page: http://www.ubuntu.com/products/WhatIsUbuntu/kubuntu
says "KDE version 3.5.5 is the current stable release".
There are lots of other examples on the website. I think to use up-to-date screenshots is very important. They would give new users a better and more accurate impression of Ubuntu compared with old screenshots.