Indeed, since Dark Matter, or Dark Energy or whichever is so repulsive, there's got to be a way to use it to our advantage.
I haven't read the article yet, but look at it this way, if every particle has an opposite anti-particle, then it's safe to assume that everything else has an anti... Well, safe if you're a crank, or me.
The scientists who claimed to have discovered cold fusion were bought off by one of the major petrol companies. As was the guy that invented the air engine. It's all there...
-Whir