Unit Testing, Agile Development, Leadership & .NET - By Roy Osherove
Very well explained and after I read Fowler's comparison of Mocks, Fakes and Stubs I am now fully aware of what's the difference between mocks and stubs. However I have to admit that I used Rhino.Mock's mocks also as stubs. That will change from now on I think.
+1 kick from me.