The idea is to rewrite a good part of the Minix 3 OS from C to D, hopefully making the code easier to understand by grouping code in modules. Minix 3 web site: http://minix3.org/ D programming language: http://www.digitalmars.com/d/
I think that this is nice, interesting idea.
Well, I am not neutral, being the main 'developer' behind this project. But I believe it will make it easier to modify the kernel, drivers and servers in the future.