Thanks, Zen.
I love this stuff.
Regarding the dark matter piece, I'm not really convinced that dark matter exists (as many scientists aren't). It is a very convenient theory, though.
Also, if dark matter doesn't interact with 'our' matter, how can we possibly detect it? There's a similar experiment that's been going on in the UK for over a decade (I think). It has yet to detect anything.
If this stuff is so abundant, and can be detected, I think we would have detected it a long time ago.
Interesting, nonetheless.