First off, I find NCrunch totally brilliant. The new test metrics screen is awesome as hell, it's clean and clear, showing exactly what you need to see and nothing more. Props too for how you managed to only count lines that aren't generated by designers.

One question: excluding files from metrics works very well. But is it possible to exclude just a single line too? I have a single line somewhere that is just too complicated to test and if I could exclude it from counting, well, that would be great.

Yeah, that would probably work. Maybe it would be more elegant to find a way to keep it out of the source code files, like you do with ignoring entire files, but I can't think of a good way to indicate what lines you want to ignore then. Line numbers wouldn't really do it :-)

I suspect the answer may involve a bit of both. I've had a few people noting the lack of support for MSTest's code coverage control attributes.