While hunting round the WebStandards site I spotted a link to a revised version of the UK's awful train timetable site. At first I assumed it was a demo, there have been quite a few makeovers of high profile sites with poor HTML, such as Slashdot and UseIT*.
However, it's not a demo, but a functional version of the site. If you want to find out about train times in the UK I heartily recommend this site, instead of the official one!
* When I googled for this link, it appears that there have been competitions to do this before, but link here is the one I was thinking of.