Jeremy said he didn't see Typemock examples anywhere, so Here's a short 10 minute screencast I made that shows off some basic features in Typemock, when working with legacy code.
it shows off the two possible syntaxes of working with Typemock: Reflective mocking and "Natural" mocking which is the record replace model you use in Rhino.mocks. You can see a whole page with examples over here.
the video is here: http://www.typemock.com/Multimedia.html