According to the post at http://blogs.msdn.com/vstsqualitytools/archive/2007/03/27/welcoming-unit-testing-to-the-pro-sku.aspx and the more detailed post at http://blogs.msdn.com/nnaderi/archive/2007/03/27/unit-testing-trickling-into-pro.aspx the next version of Visual Studio code named "Orcas" will have unit testing in the professional version. I think this will be a major step forward as making sure that code runs correctly is everyone's job and not just for the "enterprise" developer or professional tester. Anything that we can do to make sure bugs are removed before code is shipped is a good thing. I have used NUnit and you can currently use it with the professional version of Visual Studio but I think having it in the box will encourage more people to do the right thing.

Just a note: I got this link in IM the other day but problems with DNS on my blog stopped me from posting it. I am working on that now but it seems to be somewhat intermittent. If you can't get to this site, please try back again later