Spent some time today trying to get NUnit testing working with Whidbey. I found out that in the tag in the config file needs changing. I used notepad for changing the XML, which doesn't have syntax colouring. Had it had it, I would have noticed that the whole section was commented out. It took me an hour to spot it.
I installed TestDriven.NET, as TestRunner didn't appear to work with NUnit 126.96.36.199. I'm not sure whether TestDriven.NET is a website or a product, or both. Hopefully I haven't just installed a website.