Check it out:

http://www.boxerdiesel.com/

For those who don't understand boxer engines very well, I think it's important to mention that boxer engines are unique in that it can provide a stability and balance that normal V piston configurations can't offer. The difference is that rather than a V configuration, each pair of pistons simultaneously move in and out, and this is the source of the stability.

If this becomes a big hit, what this means is that it's very possible we're going to have a new generation of performance diesel cars with a strong emphasis on handling and control. Perhaps it could remove the stigma that some associate with diesels being only able to go fast in a strait line.  

How is the boxer different from an inline?  How is the inline different from a V?