DualHead2Go is the product name
Yeah, I was just reading about that, shortly before seeing your post. Interesting idea, tricking the system into thinking it's one big desktop, sending that down the cable, and splitting it in two again. Great work-around to a mind bogglingly silly little problem that they shouldn't have ever had to work around in the first place.

I love how their
spiel touts the "one taskbar across both monitors" thing as a feature, when it's really just a side effect of the trick they're doing.