WatiN (pronounced "what-in") stands for Web Application Testing in dotNet. Inspired by Watir, WatiN enables web application testing, through Internet Explorer on a Windows platform, expressed in any .Net language.
I just released WatiN 2.0 Community Technology Preview! So start automation IE and/or FireFox with WatiN as of today. Read how to get started at http://watin.sourceforge.net/firefox.html. Be aware that the API can (and there for will) change till the final 2.0 release.
A big thanks to Edward Wilde for all the work he has done on integrating FireFox in WatiN! And of course we like to hear what you think of it.