+2  A: 

This is a good primer for using Hudson with .Net:

http://redsolo.blogspot.com/2008/04/guide-to-building-net-projects-using.html

The plugins used are MSBuild, NUnit, Violations (for FXCop integration), Open Tasks. NAnt is another commonly used plugin if you already have your build scripts taking advantage of it.

Here is an example using asp.net. They modded up their own FtpTask plugin to use for deployment:

http://blogs.freshlogicstudios.com/Posts/View.aspx?Id=87a1c0f7-a75e-4f1a-8d3a-6c52c6ad9f46

Dougman