This is a helper library to make unit testing with NUnit, NUnitAsp and NMock easier. It builds on some of the ideas here and also adds some new features such as the ability to create unit tests that match the rendered output of a page or control against a base-line image. TDD for HTML and CSS !
I still have to do a complete write-up on how to use it but for those that like to download and explore, here it is:
http://www.intesoft.net/NUnitAspInjector/