After some work in the last month, WatiN has a new home: http://watin.org/
Most of the layout has stayed the same but all the content on the pages have been updated to the recent state of affairs.
The website is now running on WordPress. This makes it much easier to update the site but also to give others rights to add/edit content on the site. If you find anything not working (links for instance) or are interested in helping out maintaining the site, let me know!