In response to scary clattering noises that my 2002 M Roadster developed on Saturday afternoon it turns out that my engine is being replaced under warranty. I will be documenting the process and details on my web site. I think it's valuable for those of us unfortunate enough to be hit by issues like this to compare notes, so here are mine.
My main frustration at this point is that I've missed a few teriffic top-down driving days. I didn't realize just how much I loved my car.