It constantly amazes me how often I come across otherwise knowledgable, competent .NET programmers who haven’t even heard of unit testing let alone NUnit. I mean, here is a technology that took the panic out of programming for me, overnight. Here is a tool without which I can never know that my code is *really* working. And the Java community just gets it. JUnit is built into everything.
Not quite so over on the .NET side, much to my chagrin. I do my best to evangelize it when I can, but Andy and Dave can (and do) do a much better job. I hope this book sells a million copies.