Last week I have release WatiN 2.0 Final (2.0.50.1179). You can download the zip file from Sourceforge:
http://sourceforge.net/projects/watin/files/WatiN%202.x/2.0%20Final/WatiN-2.0.50.1179.zip/download
or install it using NuGet (need to have the Package Manager console for Visual Studio 2010 installed, get it at nuget.org). To add it to your project is as simple as:
PM> Install-Package WatiN
The release notes can be found on the new website http://watin.org (which is still in flux but getting there)
http://watin.org/documentation/release-2-0-50-11579/
Enjoy Testing with WatiN!