Here is a version hot from the build server. I've teamed up with Peli to get continuous integration working on a lot of our projects. We're using CruiseControl.NET, MSBuild and WiX to create the integrated installer. It now contains NUnit, MbUnit and an adaptor for use with the Team System test runner.
I have created a TestDriven.NET Wiki (using FlexWiki) for documentation, bug reports and feature requests. Probaly of most interest is the QuickStart tutorial. It covers only the stuff you really need to know to get the most out of the add-in. I would recommend reading it even if you've been using NUnitAddIn for a while.
You can always download the latest version here.
http://weblogs.asp.net/nunitaddin/archive/2004/09/30/236355.aspx
